This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

When this former hospital pharmacy closed in 2013 it already looked like a museum, so they turned it into one.

Historic home to one of the most famous women pioneers of the 19th century.

A statue commemorating the heroic life of a Viking postman who was the Godfather of California skiing.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A hub of information on tropical diseases and their treatments.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Abandoned bridge hidden deep in the San Gabriel Mountains.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

A burial site located in the middle of a road.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This sign designates the road that leads to the infamous Area 51.

The subtle interplay of fire and water is hard to ignore at this remote Jamaican spring.

This tiny patch of arid sand sits in one of the greenest states in the United States.

This overlooked museum houses an amazing collection of rare, antique typewriters.

These precariously placed ruins harken back to a 13th-century castle.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

This stone is a marker of one millionaire's personal vendetta against gravity.

One of the few surviving World War II-era air-raid shelters in Tokyo.

This audio art installation pays tribute to the weather and unique linguistic history of the archipelago.