Raca cave is a protected geomorphologic nature monument. Situated in the southeastern part of the island of Lastovo in Raca hill. It is 70-meters long and contains several halls and passages with amazing shapes of stalactites and stalagmites. In it the earliest evidence of man's existence on the island is found from the early Stone Age through the Bronze Age to the Hellenistic colonization of the island. Today it is inhabited by colonies of bats one of which is in the Croatian Red List of mammals with the status of endangered species.