Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

Abandoned Air Force base that has fallen into disrepair.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

This giant temperature attraction created some giant electric bills.

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

This impressive tunnel was dug entirely by hand over the course of 36 years.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

Bizarre Cavern.

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

These markers are used to document elevation changes around the famed dam.

Semi-recognized center of the world, with many oddities.

Since World War II people have been decorating this stretch of the Yuma desert with signatures arranged out of rocks.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

An inconspicuous footbridge beloved by San Diego locals.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

This Pringle-shaped ledge makes for the perfect photo op.

A world-class observatory in the California desert.

World's largest collection devoted to one fruit.

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

The world's largest wooden trestle stretches across this desert canyon in Anza-Borrego Desert State Park.

A well-worn trail through thick woods in northern Montgomery County leads to an old schoolhouse.