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

Come for the speed, leave in love with the desert.

Go inside to really appreciate this 500-year-old technological masterpiece.

A spiritual vortex among the red rocks in Sedona.

Commonly referred to as the most photographed Victorian home in the United States.

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

Quite simply the largest tree in the world (by volume).

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Abandoned Air Force base that has fallen into disrepair.

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

A motel dedicated to Southwestern nostalgia.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

Where there's quartz, there must be gold. Thus is the story of the mines of Julian, and the titillating times of the Gold Rush.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

A house built from trash known as the poor man's Hearst Castle.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The liveliest ghost town in the state.

See massive fossils that are over 200 million years old in northeastern Arizona.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

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.

One of the ghostly stops along Route 66.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

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