A geological mystery on Camelback Mountain.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

This massive roadside mascot was the first version of the giant to illustrate his butt.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

An oddly poignant roadside attraction celebrating American folklore.

Prehistoric animals decorate this popular outdoor park.

A place to eat for on-the-run agents and espionage enthusiasts.

Statue dedicated to the star of an old television show.

This striking art museum holds an amazing series of curiosity cabinets.

This cave holds a surprisingly colorful variety of geological oddities.

One Austrian's singular yard is now preserved as a folk art garden of concrete wonders.

A bizarre house filled with an astounding array of collections.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

The arboretum whose marshy soil sucked up the dreams of housing developers.

More than 5,000 contemporary and "historic" mustards from around the world.

This iconic water tower and failed bandstand is open for panoramic views once a year.

The Midwest's reigning king of surplus stores is full of nothing you need and everything you want.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

These curious caverns have been home to mushrooms, gangsters, and disco.