Otočec and its castle in the middle of the Krka

A small village by the Krka

Otočec has 865 residents according to SURS and belongs to Novo mesto municipality, in Dolenjska. The river shapes everything here. The Krka runs wide and shallow, builds tufa barriers and wraps the castle island in a park that the tourist board rates as a first-class natural landmark for its exotic trees.

Otočec, the water castle

The castle is the reason to come. It’s first recorded in 1252, when it was part of the Freising estate in Lower Carniola and run by the de Werde family, known as the knights of the islet. It then passed from one noble family to another, changed shape several times and has now been restored to its Gothic and Renaissance looks. The Novo mesto tourist office describes it as a cultural monument of national importance.

The tourist board calls it Slovenia’s only water castle. Inside is a five-star Relais & Châteaux hotel, with a restaurant drawing on Dolenjska cooking, a wine cellar set inside one of the towers and an annex, the Devetnajstica country house. In 2026 the Michelin Guide gave it one Key for the second year running, and according to its website it’s one of only four Slovenian hotels with that distinction.

Is it worth it if you’re not staying?

Yes. I think the castle is just as enjoyable from outside. Walk across the longer wooden bridge, loop round the park and sit in the courtyard with a drink and the river all around. The only thing to do first is check the website, because it closes on some days for weddings and events, as it did on 21 October 2026.

If you are staying the night, see the best hotel deals in Otočec for your dates: the well-placed rooms go fast.

Golf, treetops and thermal water

There’s more to do around the castle. The hotel claims one of the longest and most attractive golf courses in Slovenia, and the island woods hold an adventure park with bridges, ladders and nets up in the canopy. Hotel Šport, also in Otočec, has sports-themed rooms, a thermal-water pool and saunas, and the castle itself offers its guests a large thermal pool.

Otočec, Novo mesto and the Krka

Otočec is an hour from Ljubljana, so it works as a day trip, but I’d pair it with Novo mesto and a paddle on the Krka river. If you’re touring the country’s castles, it’s on my list of castles in Slovenia, and the Dolenjska spas, Dolenjske Toplice and Šmarješke Toplice, are close by.

So you do not lose the morning at the ticket office, browse tickets and tours in Otočec on GetYourGuide.

If you are staying the night, see the best hotel deals in Otočec for your dates: the well-placed rooms go fast.