This abandoned building made of petrified wood was once a hotspot for buying moonshine.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

A mysteriously abandoned campsite in San Angelo State Park.

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

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

A unique collection of artistic rides

Artist Jack Pierson made this surreal sculpture in honor of Wonder Valley, a countercultural community on edge of civilization.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

One of the ghostly stops along Route 66.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

Built as a schoolhouse in 1914, this Mission-style building has also served as a dancehall, a library, an Army canteen, and now a cultural museum.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

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

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

Hidden beneath a lake for decades, this brutalist mine has now emerged from beneath the receding waters.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

The overgrown ruins of a once thriving World War I-era copper mine.

Salt is slowly eating away this abandoned saltworks town in the desert.

After the nearby mercury mine shut down, this town was abandoned and declared a Superfund site.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A century-old miner's quarters turned mansion.

An early 20th-century jail not far from the infamous Tombstone, Arizona.

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.