The magic's in the hole!

An emporium for the weird, creepy, rare, and just plain gross.

The seamy, underground secrets of Portland's criminal past.

A cave's rare beauty held a cavernous secret hidden underground.

Legends surround this jagged rock formation in the New Mexico desert.

A clear blue swimming hole with hidden caves, still unexplored.

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

A museum dedicated to the alleged Roswell Incident.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Experience a charming 1930's version of "infotainment."

An idle pastime becomes a record holder in Boys Town, Nebraska.

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

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Birds with backpacks expedite film development for a rafting company on a remote Colorado river.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

There are eight natural springs around town, each with a slightly different taste.

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

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

This iconic science fiction house still looks like something from the future.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

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