Secluded springs in the Rio Grande Gorge offer hot bathing beside the haunted ruins of a stagecoach stop.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

A scenic hike in the High Sierra that ends at an old gold mine.

For decades, the largest tungsten producer in the U.S. was located in a spectacular setting in the high Sierra Nevada, with some of the workings over 11,000 feet.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

This impressive tunnel was dug entirely by hand over the course of 36 years.

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

One of the last free public hot springs is decorated with hippie art.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

This wilderness hike to a waterfall has an unlikely beginning in suburban Reno.

The capitol city's oldest existing cemetery.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

The tallest bridge in California was constructed for a project that was eventually cancelled.

Each winter this underground cave forms a dazzling ice palace.

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

A picturesque example of brute-force engineering conquering nature.

A Kansas nature preserve protecting the plants and animals that once stretched across central North America.

The remote graves mark the mysterious deaths of four 19th century explorers.

A meditative space out of a fantasy story.

Abandoned Air Force base that has fallen into disrepair.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

An art deco ice cream shop covered in vintage train station tiles.