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

A museum dedicated to exhibiting remarkable outsider art.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

A geological mystery on Camelback Mountain.

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

A man-made island in scenic San Francisco Bay.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

An alley covered with 20 years of bubble gum.

A massive volcanic plug is now a protected area that hosts a number of bird species.

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

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

The highest point in Virginia can only be reached by passing through ponies and flowers.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

A layered tribute to the work of mosaicist Isaiah Zagar.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The oldest Roman lighthouse still in use.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.