A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

A bizarre house filled with an astounding array of collections.

Stunning examples of Russia's 18th-century wooden architecture.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

An industrial relic is now one of Europe's most staggering art spaces.

Community bookshelf of 25-foot-tall book spines.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

An abandoned meat mecca now serves as an excellent locale for urban exploration.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

An enormous dragon scales the walls of this 17-story temple.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The deepest metro station in the world.

Museum dedicated to the terror regimes of Hungary.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

One of the highest emergency huts in the world has been waiting almost a century to give imperiled climbers a place to lie down.

This former Masonic hall has been turned into an art project that uses even more metaphysical iconography.

A Netherlands hotel where you can sleep inside a wine barrel.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Modern art meets modern convenience in possibly the world's most architecturally important public bathroom.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.