The Frasassi Caves (Italian: Grotte di Frasassi) are a remarkable karst cave system in the municipality of Genga, Italy, in the province of Ancona, Marche. They are among the most famous show caves in Italy.
The caves, discovered by a group of Ancona speleologists between 1948 and 1971,[1] are situated 7 km south of Genga, near the civil parish of San Vittore and the Genga-San Vittore railway station (Rome-Ancona line).
Rich in water, the cave system is particularly well endowed with stalactites and stalagmites.