Pyramid home to an obscure religious group that practices modern mummification.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Largest man-made excavation on earth!

Visitors to this library are in for a real-world education in modernist architecture.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

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

A multi-storied adobe complex has been inhabited for more than a thousand years.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

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

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

A miniature city built by a single hunchbacked monk.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

In this subterranean brick arcade, a small shop continues the ancient practice of bookbinding.

Five varieties of trees with custom-designed grates around the trunk are planted along the route of the Seattle Transit Tunnel.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.