This medieval Italian town is a sheer (and beautiful) cliffside defense.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Pompeii's less famous neighbor is still revealing her secrets.

The first Italian factory to produce locomotives is now a marvelous museum.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

A surreal botanical garden with an even more surreal tour guide.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A crumbling World War I fort that is reached through a series of concrete tunnels.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

This famous city eluded concrete detection until the early 2000's.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

These ruins once made up the capital of Lydia, where metal coinage was allegedly invented.

Fantastic lake on the heart of a fault line.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.