The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

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

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

Ruins of a 10th century church tucked away deep in a botanical garden.

Five candy-colored villages on the Italian Riviera.

An Italian hillside ghost town.

This 16th-century monastery has been turned into a surrealist architecture compound.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Geothermal waterfalls in Tuscany.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

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

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

Grab a cuppa at England's first and only domestic tea plantation.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

A tiny chapel clings to a precipice above Germany’s gemstone capital.

The largest brick bridge in the world.

A collection of abandoned typographic signs from Berlin and beyond.

This public pool is one of the last remaining lidos of the countless built in the 1930's as public works projects in the United Kingdom.

Climb to the top of this windmill for a scenic panorama and up-close look at wind energy production.