This magical oasis in East Texas is one of the most biodiverse acres in the country.

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.

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

The end of times arrives, at least for the fish in the O.C. Fisher Reservoir.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

Ghost town with a beer-drinking goat for mayor.

This underwater old Texas hill town only resurfaces during harsh drought.

The pit stop from "The Texas Chainsaw Massacre" now serves beef and pork barbecue, not people.

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

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

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

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

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

This beautiful ridge-top trail is dotted by tiny homes apparently built by a group of itinerant fairies.

An expansive and intricately restored mansion remains from over a century ago--and so do its ghosts.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

The final resting place of the Emperor of the United States and Protector of Mexico.

This sculpture garden in Death Valley makes you feel like you've slipped into some alternate reality.

Despite being a perfectly pleasant place to be, Loyalton can't seem to attract any visitors.

Honoring the famed folktale author, this California museum looks like it belongs in the Black Forest.