This massive geographical sculpture is so subtle, it's possible to pass by it without noticing.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A subterranean haunt where wine and homemade biscottis are always on the menu.

A chessmaster's dream destination.

A remarkably opulent mansion with a tragic history.

Giant granite rocks standing end-to-end like a train of circus elephants.

European castle ruins in an American state park are actually the product of death and grief.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

A home designed to be on the cutting edge of comfortable, low-cost living.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

One of the most acclaimed eateries in Arkansas is a two-table diner on the ground floor of a family home.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Exceptional Nepalese food can be found in a Texas gas station.

Tucked away down this Baytown alley exists a one-of-a-kind art exhibit of technicolor umbrellas.

The house's confection-like decorations are the result of one man's painstaking work over decades.

Foragers once flocked to this big beautiful bayou to hunt for pearls.

A private collection of massive steel monsters guarding a Texas pipe works.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

Mysterious glowing orbs float through the desert night.

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.