Amazing Postojna Cave: The Postoyina cave of the karst landscape, the length is 27 kilometers, you need to take a sightseeing train to enter, get off the bus and then walk to visit countless, different forms of stalactites, to see the complete journey takes about 1 and a half hours, is the second largest cave in Europe. Unlike the gorgeous and colorful light show in the domestic hole, the hole only uses yellow and white light sources, retaining the most authentic and natural landscape.