A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Contains some of the world's more disturbing wax anatomical models.

The giant skeleton sculpture is surprisingly well-traveled.

This castle was once an Italian horror cinema star.

This Roman underground canal was the longest tunnel ever built until the late 19th-century.

This Italian ski resort rose to fame when Benito Mussolini was held prisoner there and then rescued by the SS.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Ride a boat through this magnificent underground world, which now doubles as a theater.

Constructed during the 1960s, this bridge is still the highest in Italy.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This impressive chasm is one of the longest natural underground cavities in the world.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The world's tallest bridge is also possibly the most elegant.

The world's most famous cheese caves.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

This winding road through an Italian canyon may be the most scenic drive in the world.

Stalactites and stalagmites in a beautifully lit cave.