A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

The legendary building that needed ghostly approval before being built.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Odd outsider art installations surround a Gold Rush-era ghost town.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

An old California photo stand has been turned into a shrine to the cozy art of crochet.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

The largest source of fossilized insects anywhere.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

Bits and pieces from the ill-fated Donner Party's winter cabins.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

An enormous park-like oasis, full of famous Chicagoans' graves.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

This small town Texas cemetery is said to be the burial site of a UFO pilot who crashed in the 1800s.

Inmates dig the graves at the largest prison cemetery in the U.S., the final resting place of both cowboys and Indians.

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

A unique geological area spiked with wind-carved rocks that resemble teepees.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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

A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.