The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Quite simply the largest tree in the world (by volume).

The scuba diving training facility was named for the steam that rises from the cave's chimney.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The largest self-built castle in the U.S., six decades in the making.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

The world's longest known cave system.

A hand-built folk art installation covered with messages of God's love.

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

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The site of the climactic scene from the classic horror film is now a historic landmark.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.