Local folklore claims that this wall was not built for defense, but to provide labor during a time of famine.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

Once a palace for the Archbishop of York, these 15th-century ruins now serve as a haunt for history buffs.

The undercroft is a spectacular example of medieval Cistercian architecture.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

A medieval relic whose great hall once hosted Mayflower pilgrims, one of Henry VIII’s ill-fated wives, and plenty of royal intrigue.

Once the largest factory complex in all of Europe, this converted shopping center celebrates its industrial past in a big way.

Modern commuters still pass through this 2,000-year-old Roman archway.

Longest fortress system anywhere in Europe.

An apparition of Virgin Mary in Herzegovina.

The ruins of a fairytale castle with a tumultuous history stand high atop the mountains.

This former Cyprus flight hub is now a crumbling, abandoned ghost complex.

This no man's land slicing through the island is strewn with abandoned relics of another time.

The largest caravanserai in Cyprus also includes amazing examples of Ottoman architecture.

A 1970s resort city now stands abandoned, caught in the middle of a divided island.

The animals wander freely amid this gorgeous stretch of nature.

Two stunning 17th-century libraries and a cabinet of curiosities.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

Tucked away in a Prague park, a statue beloved by romantics honors a poet so nice they buried him twice.

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.