An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

It's been called “Detroit’s largest art object.”

This historic mill has been turning apples into delicious fresh cider for over a century.

Classic burger joint that’s been serving up sliders since 1952.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.

A site of pagan worship which still attracts people looking for fairies.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

An ancient city hidden in the heart of the Sierra Nevada mountains.

An ever-evolving wall of graffiti art off East Liberty Street.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Strange physical sensations and optical contradictions keep visitors coming back for more.

The city is full of whimsical portals to another world.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

Thousands of rare and sculptural desert plants are cultivated in a surreal, open-air landscape unlike anything else on Mallorca.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.