Step inside Lucy, the world's largest "elephant."

Mining caused an asbestos emergency in this small town.

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

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Home to the deepest rift anywhere on Earth.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Erroneously called the world's tallest flagpole, this landmark is devoted to "good neighborliness."

This simple highway curve has become a comedic pilgrimage site.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

Huge otherworldly domed rocks on the shore of a deadly lake.

Decommissioned experimental solar facilities that pioneered solar energy technology.

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

World's largest collection devoted to one fruit.

Version of the French Riviera destroyed by the sea.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

The ghostly remains of an accidental sea.

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

A monument celebrating the idea of reaching inaccessible places.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.