We visited magical world of Zelše caves in Rakov Škocijan, Slovenia. Emerald water that comes from Cerknica polje is quite clear during low water season.

Photo Uroš Kunaver with Lojze Blatnik, Maja Hostnik, Darja Kolar, Andrej Drevenšek, Nika Pisek, Matija Perne and Stephanie Sullivan.