The cave Koumarospilios is located near the Monastery Gouverneto and has a great historical value. The cave was excavated in 1942 by U. Jantzen and in 1972 by I. Tzedakis.
It consists of two rooms with different levels and relatively rich cave decoration of stalagmites and stalactites. Both surveys revealed pottery of Neolithic and Minoan era. Specifically, the main use of the cave as a residence focuses on Neolithic period (3650/3500 - 2900 BC) and is was reused as shelter during the Late Minoan (1300-1250 BC) period.