Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

The world's second-longest burning light bulb.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

Continuing the tradition of the dime museum in style.

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

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

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

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

This mountain tram provides stunning views while hanging from a single, steel thread.

The wreckage of a crash that killed nine people still litters the Franklin Mountains.

Search for traces of the dinosaurs that roamed here more than 90 million years ago.

The house's confection-like decorations are the result of one man's painstaking work over decades.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Oddly shaped rock formation, misassociated with a nearby utopian community.

A house carved into a rock in the 1940s.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

Metal water storage tank turned ethereal concert hall.

The largest self-built castle in the U.S., six decades in the making.

The highest bridge in America was built for an almost unnervingly small amount of money.

One of the smallest towns in the United States.

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

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.