These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

A breathtaking viewing platform over the Alps.

This abandoned Victorian-style house was built in 1884.

A grove of "candelabra redwoods" deep in California's Lost Coast.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

A taste of Middle Earth, in the middle of the Bayou City.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

This scrap yard doubles as a naive art gallery full of found art and farm animals.

A sculpture for the sun and stars, created by Nancy Holt.

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This huge repository of local history housed in an old J.C.Penney's is home to the largest model train set in Southeast Texas.

The 19th-century ruins hide deep in an overgrown forest.

A small island hides in plain sight on Austin's Lady Bird Lake.

In the late 1990s, a mechanic and fan bought this iconic sportscar back from the dead.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

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

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

An abandoned movie set in the desert of West Texas.

This beautiful grotto is one of those places where you can't believe you're just outside Austin.

A mysterious drive-in nestled in the forest that leaves little to the imagination.