Underwater Orda cave, Russia!
** The biggest underwater gypsum cave in the world.
** Second in Eurasia and one of the biggest caves in the world regarding to volumes of its galleries.
** It is situated near Orda village (Perm region, Ural, Russia).
** There is extremely low water temperature – about 3C and 20C below zero on surface.
** The cave is extended - about 5 km. Under this circumstances shooting became very challenging.