In 1959 a villager of Petralona, in Chalkidiki, Northern Greece, in his effort to find sources of water for the needs of the settlement, found a small cleft on the slopes of Mount Katsika. Two adventurous young men were lowered by rope to a depth of 13 meters. When they surfaced, they described the beautiful formations of stalactites and stalagmites, which they had seen for the first time in their lives.
in N. Marmaras, Halkidiki