Pirate’s Corridor, the spectacularly illuminated Hell, Robber’s Cave or the stalactite formations of shapes of colors named White Mouse, Elephant Ears, Rococo Dolls or Gingerbread Cottage – you can see all that on a visit to the longest dolomite cave in the Czech Republic. The physically undemanding 350 m long trail will take you to the bottom of the cave to the largest underground lake in the country. If the crystal clear greenish surface tempts you for a swim, better think twice: the water in the lake is only 8°C.