The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

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

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

"Only the devil could play golf here."

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

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

The original movie set for the home of 'Star Wars' hero Luke Skywalker.

One of the most important yet well-hidden museums dedicated to the history of medicine.

An extraordinary collection of 18th century anatomical waxworks.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

The legendary building that needed ghostly approval before being built.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

A world-class observatory in the California desert.

The ghostly remains of an accidental sea.

An essential stop before plundering, BYO Cutlass.

San Francisco's newly reopened hands-on science museum.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This historic tower in the California desert promises visitors a "vortex of good vibes".

This mother-daughter run curiosities shop is a beautifully odd mix of taxidermy and exotic plants.

Human skulls and a stuffed goat made into a rocking chair can be found at this strange little store.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.