This black shoreline is made up of exploded lava particles.

Happen to come across a dead eagle? Send it to America's official dead eagle warehouse.

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.

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

This museum offers an actual time machine back through Colorado's past.

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

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

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

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This super steep hike ascends 2,000 feet in less than a mile.

The largest source of fossilized insects anywhere.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

An Old West film set seen in countless TV shows and movies is open for the public to explore.

A "haunted" landmark on the coast of Southern California.

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

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

A museum and tribute to a brave profession.

A geological mystery on Camelback Mountain.

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

This striking public art installation is suspended above a public park, designed to gently move in the breeze.