From Koper: 5-Hour Tour to Postojna Cave & Predjama Castle

Get ready to explore Slovenia's most expansive cave system, venturing deep into its incredible subterranean chambers! You'll embark on a fascinating guided exploration, complete with a delightful ride on an electric train that winds through this underground wonderland. And don't miss the chance to pause at the truly unique Predjama Castle – it's an absolutely breathtaking backdrop for your travel photos!

Get ready for an amazing 5-hour adventure! We'll journey into the heart of the Earth to explore the incredible Postojna Cave, and we'll pause for a picture-perfect moment at the world's largest cave castle, the magnificent Predjama Castle. Prepare to be amazed as you delve into the vast Postojna Cave system. With over 20 kilometers (12 miles) of winding passages, you'll experience an unforgettable underground train ride through this subterranean wonderland. The Postojna Cave system isn't just big; it's the biggest known cave system in the country and the second-largest accessible to visitors anywhere on the planet! Nestled beneath the rolling karstic limestone plateau on the eastern edge of the Postojna basin, these caves offer a rare chance to glimpse the unique creatures that call this hidden world home. And just a short hop – ten minutes, to be exact – from the Postojna Caves, you'll discover another Karst region gem: Predjama Castle. This incredible fortress is built right into a massive cavern carved into a towering rock face, perched above the karstic swallow hole of the Lokva stream. As the world's largest cave castle, it's a truly breathtaking sight and an absolute must-photograph location!