Who needs fancy modern water slides when this giant North Carolina rock works just as well?

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

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

This grand mansion has starred in everything from Bones to Buffy.

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

A miniature rainforest is growing inside of a Midtown Manhattan office building.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

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

Shop selling 500 flavors of soda has something for everyone.

A common entry point to the Griffith Observatory trail holds its own wonders.

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

Enormous lake at the bottom of a unique cave system.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A colorful architectural gem in Seattle's uniquely modern Central Library.

A meditative space out of a fantasy story.

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

Where manatees are the snowbird vacationers in these balmy Florida springs.

The trials and tribulations of marking Poe's grave.

A hotel and restaurant serving as the mecca of kitsch.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

These eerie outliers of the lightning bug family glow a mysterious blue color.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The angel of death appears to weep black tears at this grave marker.