This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A mysterious "wedding cake" castle in the middle of the urban desert.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The fading, forgotten remains of a once bright and booming factory.

What is the Thing?

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

An urban laboratory.

The world's largest military aircraft cemetery.

A spiritual vortex among the red rocks in Sedona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A reproduction of earth's many biomes.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

While comics are the main attraction at this megastore, the second floor plays host to an exhibit fit for a museum.

Victorian "Fancy Craft" Hair Wreaths and Relics.

There are eight natural springs around town, each with a slightly different taste.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.