A view-altering observatory at the University of Texas.

An exquisite grouping of structures made from 10 tons of invasive saplings.

A popular swimming hole that hides one of America's most deadly diving spots.

This soda factory is one of the last in America to use real cane sugar despite the protestations of Dr Pepper.

An emerald-green grotto just a short trip from Austin.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

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

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

An exotic wildlife habitat right off The Strip.

New Orleans' famous cemetery, located on the site of a former race track.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

Civil War dumping ground for the bodies of terrorized Union sympathizers.

A mysteriously abandoned campsite in San Angelo State Park.

This grimly-titled Texas cemetery is all that remains of a Wild West settlement with possibly the worst name.

This giant temperature attraction created some giant electric bills.

Abandoned Air Force base that has fallen into disrepair.

A former utopian healing center created by a huckster and built by derelicts.

Hundreds of trees made from glass bottles make up this forest on Route 66.

One of the ghostly stops along Route 66.

This strangely vacant Western amusement seems to be an empty tribute to residents of Lucerne Valley.

A ring of creosote bushes that are estimated to be 11,700 years old.

The cluster of boulders near Fort Irwin is covered in military insignia.

Nationwide network of co-ownership underground catastrophe shelters.