An abandoned early-20th-century boomtown sits within the Calico Rock city limits.

This century-old roadside attraction is full of bizarre rock formations.

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

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

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

Erosion and time have created a naturally-formed water park.

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

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

Less a museum than a bizarre fantasy world created by artists and engineers.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

A former chicken restaurant that doubled as a speakeasy is now a quirky home full of wonderfully strange traditions.

When you can afford only half a road, you build only half a road.

These massive mitts are made of 30 tons of devotional bronze.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

Nature's biggest mammal swims in landlocked Oklahoma.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

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

These aggressively sustainable art homes look like something out of 1970's science fiction.

Legends surround this jagged rock formation in the New Mexico desert.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

This highest peak in New Mexico is named after an explorer who had a habit of lending his monicker to peaks.