The highest monolith in the eastern Mediterranean, Kalamos, is at the eastern end of the island and it constitutes its most impressive natural sight. “The most terrifying rock in the world”, according to a 18th century French traveler, is particularly popular with experienced rappellers and climbers.
A part of Kalamos is the cave of Dracontospilo which can be reached only by footpath. It is a fascinating spectacle festooned with stalactites and stalagmites. From there you may spot a school of seals which, according to the locals, make frequent appearances in the area.