The mesmerizing beauty of the Postojna Cave and the mysterious castle of Predjama rank among the most precious jewels of Slovenia.

We will explore the wonderful underground world and excite our imagination in a striking medieval castle.
It has taken millions of years for the clear waters of the River Pivka to create these 21km of underground labyrinth of passages, caverns and great halls, decorated with dripstones, translucent curtains and pillars of fascinating shapes and colors. After an unforgettable underground train ride to the heart of the cave system, experienced guides will accompany you on a walk through the subtly lit fairy-tale like underground world. You will glimpse a million years in one moment, admiring delicate spaghetti-like stalactites, massive pillars and other geological wonders. Back in the daylight, the trip will continue towards the astonishing castle of the robber knight Erasmus. For centuries dramatically hanging in over a 100-meter-high vertical cliff, it's waiting for you to enter and discover its secrets, legends and myths. Driving through green scenery, we return to Koper.