Slovenia is known for being one of the most ... The stunning Predjama Castle, the largest cave castle in the world, is built inside the mouth of the cave, halfway up a 123-meter cliff.
Explore Slovenia's breathtaking underground wonders ... and river dynamics. Explore Predjama Castle Cave, a medieval castle built into the mouth of a cliffside cave, blending natural wonder ...
Start in Ljubljana, Slovenia’s lively capital ... Dating back to the 13th century, this fortified castle is integrated into the caves beneath it, where you can explore the stalactites ...