An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The location of the world's first telescope demonstration.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Elevated freight railway turned wildly successful urban park.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

One of the oldest of its kind.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

An incredibly well-preserved piece of ninth-century Viking poop.

America's oldest Eastern European synagogue provided the immigrants of crowded Lower East Side tenements a space of sanctuary.

Experience what life was like in Ireland during the Viking and medieval ages.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

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

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

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

This enormous World War II relic is one of the largest wooden structures in the world.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.