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

A clear blue swimming hole with hidden caves, still unexplored.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

Tour the sci-fi-esque reality of governmental disease management.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

A hotel and restaurant serving as the mecca of kitsch.

Enormous lake at the bottom of a unique cave system.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A bizarre house filled with an astounding array of collections.

A toxic ghost town sitting atop a massive coal fire.

A snapshot of the city's fascinating voodoo culture.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

Largest Kauri tree in New Zealand.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.