A downtown park built on top of unclaimed graves.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This museum offers an actual time machine back through Colorado's past.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

The world's largest fire hydrant is supposedly tornado-proof.

This titanic steel chain linking two buildings was installed without permission but instantly beloved.

Tour the oldest unrestored plantation house in America that is open to the public.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

The angel of death appears to weep black tears at this grave marker.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

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

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Largest tulip festival in America, includes fireworks, a parade, and a carnival.

This museum remembers an apocalyptic cult that became more famous for baseball than religious radicalism.

World's largest Christmas store.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

This shallow cave got its name from copious amount of human bones found inside.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

The remains of an abandoned dinosaur theme park litter the woods just off the highway.

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