These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

World's largest college campus includes a wildlife sanctuary and a former movie set on more than 28,000 acres.

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.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

More than five miles of underground passageways.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

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

What is the Thing?

A reproduction of earth's many biomes.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

The Magical World of George Phar Legler.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Some islands... they come, they go, especially on Lake Travis.

In the fictional world of Kcymaerxthaere, this was the former home of the Marshal of Gravity and the site of his tragic death.

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

Life's work of sculptor Elisabet Ney remains preserved in her last studio.

Decades of discarded bottle caps line this alleyway, a fixture of Texas A&M.

Beer lover's can-covered house.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

A health museum containing a 27’’½-foot intestine.