The first full-scale tunnel built in America is short but scenic.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Lucha Libre (Mexican Wrestling) themed taco shop.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

One of the most unusual geological features, recognizable from a dozen hit movies.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

This glamorous old building is said to have inspired the Tower of Terror.

A former utopian healing center created by a huckster and built by derelicts.

San Diego's most historic and haunted home.

A ruined hotel with an unlucky history and an eerie present.

The abandoned personal amusement park of the King of Pop.

Home to the "Circus" trees created by Axel Erlandson.

This massive redwood tree has a hole in the base big enough to drive through.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

One of the ghostly stops along Route 66.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

The site of murders and Satanic cult gatherings.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Hundreds of trees made from glass bottles make up this forest on Route 66.