The ghostly remains of an accidental sea.

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

A self-built castle made by a mysterious man.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

Two thousand artifacts from around the world collected by one woman who loved to travel.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Where America's first doomsday cult awaited the end of the world.

A beautiful Victorian-era cemetery, complete with a miniature village.

Hidden in the hills of Hollywood, this secluded Oz-themed garden is dotted with dozens of thrones.

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

A semi-scholarly approach to sex.

Resting place of Hollywood's immortals is also site of summer film screenings.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

A kaleidoscopic warehouse-maze of handmade neon signs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Scene of the grisly murder of two Norwegian women in 1873.

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.