A lily hole is a rock cavity formed in a special way. There is an entrance and the ceiling has various unfilled spaces. It is believed to be formed by the collapse of rock masses. Despite the controversial origin, the Lily hole provides refuge for several species of bats.
These cave is one of the few natural habitats in which protected species form colonies. There are 4 species of bats : Mediterranean horseshoe bat (Rhinolophus euryale), Greater horseshoe bat (Rhinolophus ferrumequinum), Common bent-wing bat (Miniopterus schreibersii) and Geoffroy’s bat (Myotis emarginatus).