Located about 40 miles from Urbino, the remarkable Frasassi Caves are some of the largest karst rock formations ever discovered in Italy. Situated in the beautiful Gola della Rosa Natural Park, the caves were only discovered in 1971 by a group of enthusiastic geologists.
More about Frasassi Caves
Having been made safe for public visits, the caves - which drop down to 400m below ground level - are now among the most famous and most popular show caves in the country.
At their largest, the caves are about 5,000 metres from end to end, and they create a winding labyrinth of huge underground rooms, now beautifully illuminated to show off the huge stalagmites and stalactites on display within.