One of few remaining antique carousels with stationary animals in the U.S.

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

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

A collection of over 15,000 zines works to preserve DIY publishing culture.

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

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.

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

The largest source of fossilized insects anywhere.

When ecosystems collide in the arid Southwest.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

The highest bridge in America was built for an almost unnervingly small amount of money.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

The largest self-built castle in the U.S., six decades in the making.

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

London's marvelous wildfowl reserve along the Thames.

The "Mystery and Company of Merchant Adventurers" is an Elizabethan-era hangout in Moscow.

The avant-garde design was able to bypass strict Soviet regulations on architecture.

Museum design and public transportation meet in this unique Russian train car.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.