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

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.

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

The largest source of fossilized insects anywhere.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

Community owned and operated, this property is home to a diverse set of nudists.

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

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.

This naturally-sourced hot spring is now home to a clothing-optional resort.

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

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

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

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

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