It is the only tourist cave of Kythira. It is located in a steep area west of Kythira, about 60 meters above sea level. It was once a shrine of the nymphs and later a place of worship in the Christian years.
At the expense of Anna Petrocheilou in 1955, the cave was explored in detail and mapped. The cave has a total area of 2,000 square meters. Stalactites and stalagmites offer a unique spectacle in their color variety, in shades of red, white and black.
The name of the cave refers to the worship of Agia Sofia. Inside the cave is the church of the Saint of the same name. Also, the vestibule of the cave is adorned by a built iconostasis with very important iconographies-preserved in excellent condition, which according to their style date back to the 13th century AD.
The cave is partially arranged, while retaining its primary characteristics. The interior of the cave of Agia Sophia immediately attracts the attention of the visitor. The Polymorphic dripping decoration is exceptional with the wonderful stoneshaped complexes. There are striking color variations of black, white and red due to the chemical composition of the rocks of the area. Its rooms can generally be described as spacious in the majority and their height in some places reaches seven meters.