Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A restaurant and observation deck built in a unique broadcasting antenna.

Started as a kitchen garden, now the second largest botanical garden in the world.

These strikingly barren, rolling red hills were caused by bad farming practices.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

A true Valhalla for cactus and succulent lovers.

The first green space constructed on an elevated viaduct.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

A winding path built in secret on the edge of the continent.