An unreal vintage shop that wears its dadaist influence on its zombie fish.

A modernist landscape of water and sci-fi concrete.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A building so large that it has its own weather.

These azure waters were thought to lead to the Mayan Underworld.

A toxic ghost town sitting atop a massive coal fire.

The first declared National Monument in the United States.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

A museum dedicated to the alleged Roswell Incident.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A time-capsule monument reminding future generations of the importance of efficient and effective use of natural resources.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

The largest land animal skull ever discovered.

Built from oil field parts and resembling a teepee, this abandoned mid-century church is hoping for a comeback.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

Behemoth, cannon-like telescope operated by generations of Irish earls.

An 1814 castle that hosts an exhibit of "explorabilia".