Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

A little-known hot spring haven right below the highway.

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 ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

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

When ecosystems collide in the arid Southwest.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

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

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

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

This erect, phallic geological spire wasn't always named so domestically.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

Found: Garden of Eden in Miami-Dade County, Florida.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.