ANCONA, ITALY – AUGUST 17: A general view of the Frasassi Caves on August 17, 2018 in the province of Ancona, Marche in the municipality of Genga, Italy. The remarkable karst cave system are among the most famous show caves in Italy, discovered by a group of Ancona speleologists in 1971 are situated 7 kilometres (4 miles) south of Genga. Rich in water, the cave system is particularly well endowed with stalactites and stalagmites. (Photo by Simona Granati – Corbis/Corbis via Getty Images)
