"Den of Libithridon Nymphs" according to Strabo (1st BC century Greek geographer, philosopher and historian) or the "Sanctuary of Libithridon Muses” according Pausanias (2nd AD Greek traveler and geographer), is located between Koronia and Agia Triada, on the north-eastern slopes of Mount Helicon, at an altitude of about 820 meters. Its interior consists of a hall of 8Χ10 meters. At the entrance of the cave there is the epigraph "Koronia Nymph". The findings include vases, micro-sculptures and various offerings.

The cave is not an organised archaeological site. A selection of findings is exhibited in the Archaeological Museum of Thebes. A small piece of passable dirt road leads to the site.