Genga - Caves Grotte di Frasassi Discovered in 1971 they are karst caves and are considered a real attraction for the Marche region. They are located in the Gola della Rossa Regional Natural Park. The caves are open 11 months a year, in January they are closed.
Ancona - Caves Grotte romane They are an extraordinary example of stone quarries used by the Romans since the first century BC, in particular excavated by slaves. It is thought that from the bowels of the caves came out the blocks of stone with which the Poggio, Massignano was built and some monuments and churches of Ancona (perhaps even San Ciriaco).