15 Unique Castles in Slovenia to Visit (Plus An Unexpected Bonus)

When we started planning our trip to Slovenia, I knew we’d visit Bled and Ljubljana, but I hadn’t expected to fall down a castle rabbit hole. I figured we’d see a few towers, take some scenic photos, and move on. Instead, we found ourselves stopping at castle after castle—some perched on cliffs, some tucked away in forests, and at least one that might actually be haunted.

This list isn’t a history lesson or a checklist of every castle in the country. It’s a roundup of the ones that are genuinely fun to visit—castles with amazing views, weird stories, beautiful settings, or something a little extra – and maybe even staying overnight in.

We’ve visited many of these and picked the ones that are fun, interesting, or unforgettable—for all the right reasons.

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Top Slovenia Castles to Visit

Slovenia has more than 500 castles, but not all of them are easy—or worth—it to visit. This list focuses on some of the best ones that you can actually explore, from well-known favourites to lesser-known spots that are still easy to reach on a road trip.

1. Ljubljana Castle

It’s hard to miss Ljubljana Castle. Perched on a hill right above the city centre, it’s visible from just about anywhere in town—and chances are, you’ll end up walking past it more than once.

You can hike up (it’s a short but steep walk through the forest) or take the funicular, which is especially fun with kids. Once you’re at the top, the views across Ljubljana’s red rooftops and out to the mountains are worth the trip alone.

The castle itself is part historic site, part event space, and part museum. There’s an exhibition on Slovenian history, a puppet museum, and a watchtower you can climb for even better views. While some parts are free to explore, it’s worth getting the full ticket if you want access to the tower and exhibitions. 

Ljubljana Castle is one of the top attractions in the city, and it’s easily one of the best things to do in Ljubljana with kids. There’s plenty of space to explore, lots to see, and the funicular adds a little adventure to the visit.

Our tip: I suggest taking the funicular up, then walking back down along the pathways. There’s a few steps, but not too steep, and it’s a nice walk back down to the city. 

2. Bled Castle

Bled Castle might be the most photographed castle in Slovenia—and it’s easy to see why. Perched high above Lake Bled, it offers one of the most iconic views in the country. From the top, you can see the lake, the island church, and the surrounding mountains all in one sweeping panorama.

The castle itself is small but well maintained, with a museum, a medieval printing shop, and a blacksmith demo that’s especially fun for kids. There’s also a restaurant with lake views and a small café, which makes it easy to linger a little longer.

The castle, which is one of the top attractions in Lake Bled, can get busy, especially in summer. If you’re visiting during high season, try to arrive early in the morning or later in the afternoon when it’s quieter. While it’s not a huge site and doesn’t take a long time to visit, the views alone make it worth the visit.

Our tip: The museum is nicely done, but our favourite part was the old-school print shop. You can watch them make prints using traditional techniques—and even take one home as a souvenir.

3. Predjama Castle

Predjama Castle looks like something out of a movie – because it actually is! It’s been featured in films like Armour of God with Jackie Chan, and more recently in Netflix’s The Witcher series. 

Built directly into the side of a cliff, it’s easily one of the most dramatic and unusual castles in Slovenia—and probably one of the most memorable stops of our trip.

From the outside, it’s incredible to see. The stone walls seem to grow right out of the rock face, and the whole thing towers above a deep gorge. Inside, it’s more rugged than polished, which only adds to the atmosphere. You’ll find narrow passageways, simple rooms, and a few displays that tell the story of the castle and its most legendary resident—Erazem, a rebellious knight who managed to hold off a siege thanks to a secret tunnel leading out through the cave behind the castle.

There’s a self-guided audio tour that walks you through the castle’s history, and it’s surprisingly well done. My kids were completely hooked—especially by the interesting story of how Erazem met his end. If you’re visiting with kids, it’s definitely worth grabbing the headset.

We’ve got a full post on what to expect inside Predjama Castle, but in short—it’s worth the stop. It’s easy to combine with nearby Postojna Cave, and together they make a great day of exploring both above and below ground.

Good to Know: The cave system beneath the castle is open in the summer months and adds an extra bit of adventure. Just note it’s not stroller-friendly, and the stairs can be steep and slippery—good shoes are a must.

More Castles in Slovenia Worth Visiting

These castles might not be as famous as the first three we mentioned above, but they’re still worth a visit!

4. Celje Castle

Celje Castle is the largest medieval fortress in Slovenia, and wandering through its ruins really gives you that old-world, castle-on-a-hilltop feeling. With thick stone walls, crumbling towers, and panoramic views over the Savinja River valley, it’s a place that invites exploring.

The castle dates back to the 12th century and was once home to the powerful Counts of Celje. Today, it’s mostly ruins—but in the best possible way. You can climb the towers, walk the old defensive walls, and take your time without feeling rushed or crowded. 

There are free guided tours available, and they’re a great way to dive into the stories of the castle’s past—including the rise of the mighty Counts of Celje and the darker secrets of Frederick’s Tower. The storytelling really brings the place to life.

It’s a great stop for kids, too. There’s space to run, towers to climb, and plenty of spots to play pretend—no museum ropes or “don’t touch” signs here.

5. Ptuj Castle

Set on a hill overlooking red rooftops and the Drava River, Ptuj Castle has a different feel from the others on this list. It’s less about dramatic landscapes and more about history and charm. Located in Slovenia’s oldest town, the castle has seen centuries of change—and today, it holds a surprisingly eclectic museum collection.

Inside, you’ll find everything from traditional musical instruments and armour to ornate furniture and historical fashion. It’s a bit of a mix, but somehow it works. The museum is well laid out, and the setting adds a lot to the experience.

The views from the castle courtyard are lovely, and it’s an easy walk from the centre of town. If you’re road-tripping through eastern Slovenia, Ptuj is worth a stop—and the castle is the highlight.

Fun fact: Ptuj Castle was built on the remains of a Roman fortress and temple. If you look closely at the castle walls, you can still spot some of the ancient Roman stones, including inscriptions and reliefs dedicated to Jupiter.

6. Otočec Castle

Otočec Castle looks like it was lifted straight out of a fairy tale, complete with a wooden bridge and swans gliding along the river. It’s the only water castle in Slovenia, set on a small island in the middle of the Krka River, and surrounded by trees and walking paths.

The castle has been beautifully restored and now operates as a luxury hotel. Even if you’re not staying overnight, it’s still worth a visit. You can walk across the wooden bridge, explore the island, and enjoy the beautiful setting. There’s also a world-class restaurant inside the castle, if you’re looking for a memorable spot for lunch. 

It’s one of the most romantic castles in Slovenia and popular for weddings, but it’s also a nice place to let kids run around and spot ducks from the bridges. The grounds are open to visitors, so you can enjoy the atmosphere even without booking a room. (If you do want to book a room, check prices and availability here)

7. Škofja Loka Castle

Loka Castle sits on a hill above one of the prettiest towns in Slovenia. The medieval centre of Škofja Loka is full of colourful buildings, cobblestone streets, and a stone bridge that feels like it belongs in a fairy tale. It’s often named as one of the most beautiful places to visit in Slovenia, and the castle above it all is the perfect place to take it in.

The castle itself dates back to the 13th century and now houses a museum with exhibits on local history, art, and culture. It’s not a big museum, but it’s thoughtfully done and gives some good context for the area. The real highlight, though, is the view from the grounds—especially if you visit on a clear day.

You can walk up to the castle from the town centre in about 10 minutes. The path is short but a bit steep, so plan for a quick uphill climb.

Personal note: We actually didn’t make it to Škofja Loka on our trip—still not sure how we missed it since we drove right by. But it’s definitely on our list for next time, and it’s one of those places we’ve heard nothing but good things about.

8. Podsreda Castle

If you’re looking for a castle that feels authentically medieval, Podsreda Castle is it. Tucked away in the Kozjansko Regional Park near the Croatian border, it’s one of the best-preserved examples of Romanesque architecture in Slovenia. Think thick stone walls, arched windows, a barbican, and even a dungeon—it’s got all the ingredients of a proper fortress.

Built in the 12th century, Podsreda has been carefully restored, and while it’s not as flashy as some of the more famous castles, it feels real in a way that’s hard to describe. There’s a quiet, remote atmosphere here that makes it easy to imagine what life was like centuries ago.

You can explore the castle on your own with an audio guide or join one of several guided tours. For families, there’s a fun Treasure Hunt at Podsreda Castle, which turns the visit into a bit of an adventure for kids. And if you want to make it extra memorable, you can even stay overnight in the four-star castle rooms and apartments—complete with a castle breakfast made from local delicacies.

Tip: If you’re in eastern Slovenia or heading toward the Croatian border, this one makes a great off-the-beaten-path stop—and spending the night in a castle is something kids won’t forget.

9. Snežnik Castle

Tucked away in southern Slovenia, Snežnik Castle feels like something out of a painting. The snow-white walls, the reflective pond full of ducks, and the quiet forest surrounding it all combine to make it one of the most peaceful and romantic castles we visited.

Dating back to the 13th century, Snežnik Castle is one of the few in Slovenia that’s fully furnished, giving you a real sense of how nobility once lived. The interior has been carefully preserved, with everything from antique furniture to hunting trophies, books, and original décor. You walk through it as though the owners just stepped out for a stroll.

It’s also a popular spot for weddings, and it’s easy to see why. But beyond the romance, it’s a great stop for families—there’s plenty of space to wander around outside, and the setting is perfect for a slower-paced castle visit. The grounds are open and free to explore even if you don’t go inside, and the beautiful setting makes it a great break from busier tourist spots.

10. Brdo Castle

Brdo Castle might not look like a medieval fortress, but it plays an important role in modern Slovenia. Set in a large estate near Kranj, it’s where the government hosts visiting presidents, royalty, and diplomats—basically, Slovenia’s go-to spot for official events and international guests.

You can’t always go inside—access depends on official events—but the Brdo estate itself is open to the public and worth exploring. The grounds are beautifully landscaped, with wide walking paths, lakes, sculptures, and forested areas. It’s a peaceful place to wander, and a great option if you’re looking for a castle experience that’s more about elegance and nature than turrets and towers.

It’s also a popular spot for locals, with walking trails, picnic areas, and space for kids to run. And because it’s close to the Ljubljana airport, it’s an easy stop at the beginning or end of a trip.

Good to Know: Even if you can’t see the inside of the castle, the grounds are lovely and easy to explore. If you’re travelling with kids, it’s a low-key place to stretch your legs and enjoy a slower morning or afternoon.

11. Negova Castle

Negova Castle isn’t as well known as some of the others on this list, but it definitely leaves an impression. Located near the town of Gornja Radgona in northeastern Slovenia, it’s part castle, part local legend—and possibly haunted.

The castle dates back to the 12th century, but it’s the stories—not the architecture—that really make Negova stand out. Legend says the castle is haunted by the friendly witch Apolonija, who still wanders its halls. In one wall resides the ghost of a Turk, sealed up alive by the castle’s furious residents centuries ago. And if that’s not enough, look up when you arrive—above the entrance hangs a cannonball said to have been fired by King Matjaž (Matthias Corvinus) when he attacked the castle in 1487.

The castle occasionally hosts exhibitions and events, but it’s not overly polished—more quiet and slightly eerie, which somehow suits it. If you’re into places with a bit of mystery and local legend, Negova’s worth the stop.

12. Kostel Castle

Hidden away in southern Slovenia near the Croatian border, Kostel Castle has one of the most dramatic settings of any castle in the country. It sits high on a hill, surrounded by thick forest and rolling mountains, and feels completely removed from the tourist trail.

The castle itself dates back to the 13th century and was once one of the largest fortresses in the region. It played a major role in defending the area from Ottoman invasions, and its walls still stretch impressively along the hilltop.

Today, it’s partly in ruins but open for visitors. There are occasional events and guided tours, but even wandering the site on your own is worth the visit. It’s quiet, scenic, and full of atmosphere—especially if you enjoy castles that feel a little wild and untouched.

13. Mokrice Castle

Set in the hills near the Croatian border, Mokrice Castle has a unique blend of medieval history and a surprisingly modern twist. Surrounded by forests and rolling green fairways, the castle is now part of a sprawling estate that includes a beautiful 18-hole golf course. If you’re into golf, this one’s worth noting—one of the holes here is considered among the most challenging in this part of Europe.

The castle itself dates back to the 15th century and has been carefully restored. For a unique experience, you can even stay overnight in the castle, where the thick stone walls will make you feel like you’ve stepped back in time. But don’t worry—there are plenty of modern conveniences in this deluxe hotel, with its stylish rooms and excellent restaurant. There’s also plenty of space to relax around the grounds.

One of the big draws for families is that the castle is just a five-minute drive from Terme Čatež, the largest water park in Central Europe. In winter, the Winter Thermal Riviera offers indoor thermal pools and water slides, making it a fun stop even when the weather’s not great. When it is, the trails around the castle and into the Gorjanci Hills are perfect for hiking or biking right from your doorstep.

If you’re curious, you can check prices and availability here to see what a night at the castle might look like.

14. Velenje Castle

Velenje Castle is one of the best-preserved Renaissance castles in Slovenia, and it’s exactly what many people picture when they think of a “fairy-tale castle.” Perched on a hill above the town of Velenje, its white walls and red-tiled roof stand out against the green hills and forested backdrop.

The castle houses a regional museum with several interesting exhibits, including an extensive African art collection—something you wouldn’t expect to find in a small Slovenian town. There are also displays on local history and the region’s mining heritage. It’s compact but well done, and the views from the terrace are lovely.

It’s not a huge site, but it’s peaceful, easy to explore, and a nice stop if you’re in the area. Kids will enjoy the wide stone courtyard and the slightly hidden feel of the castle, and the museum is approachable for families.

Tip: If you’re travelling between Ljubljana and Maribor or heading out toward eastern Slovenia, Velenje makes a great detour. It’s quiet, not too touristy, and just a really pleasant place to spend an hour or two.

15. Maribor Castle

Maribor Castle doesn’t sit on a cliff or hide in the forest—it’s right in the middle of Slovenia’s second-largest city. But that urban setting is what makes it different. It’s easy to reach, surrounded by cafés and shops, and a nice cultural stop if you’re already exploring the city centre.

The castle dates back to the 15th century and was once part of Maribor’s medieval fortifications. Over time, it became more of a noble residence than a fortress, and today it houses the Maribor Regional Museum. Inside, you’ll find exhibits on everything from traditional dress and furniture to archaeological finds and local history. There’s even a Baroque hall with scenes from the story of Odysseus—my kids, who are big fans of Greek mythology thanks to the Greeking Out podcast, thought that was a pretty cool surprise.

It’s not the most dramatic castle on this list, but the museum is interesting and offers a glimpse into how people lived in this part of Slovenia through the years.

My suggestion: If you’re already in Maribor, it’s a great spot to escape the heat in summer or enjoy a quiet afternoon when the weather’s not ideal. Bonus—it’s right near the Old Vine House, home to the world’s oldest grapevine, so you can easily pair a museum visit with a wine tasting.

Bonus: Cmurek Castle

Not many travellers make it to Cmurek Castle, but it’s one of the most unusual—and unforgettable—castles in Slovenia. Perched on a cliff near the Austrian border, this is one of the oldest preserved castles in the country, but also houses the Museum of Madness. It explores the history of mental health treatment in Slovenia, and it’s located in what used to be a psychiatric hospital. It’s not your classic castle day out, but if you’re into places that feel a little offbeat, this one definitely qualifies.

Final Thoughts: Most Unique Castles in Slovenia to Visit

Whether you’re interested in castles, or just want to add a few unique stops to your itinerary, these are some of the best castles in Slovenia to visit – with stories, views and just the right amount of magic. From dramatic cliffside fortresses to quiet ruins and fairy-tale towers, they were some of our favourite places to explore. Some are grand, others a little quirky—but all of them are worth the stop.

Want to explore more of Slovenia?

We’ve got plenty of helpful posts to keep you inspired—whether you’re looking for the best things to do in Lake Bohinj, figuring out the easiest way to get from Ljubljana to Lake Bled, or planning to drive the Vršič Pass. And don’t miss our guide to Slovenia with kids, plus fun facts, itinerary tips, and a kids activity book that you can download.