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

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

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

This iconic science fiction house still looks like something from the future.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

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

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

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

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

The largest source of fossilized insects anywhere.

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.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

Abandoned silver mine strewn with wrecked and twisted structures.

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

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

When ecosystems collide in the arid Southwest.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

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

A starship has landed in Texas, a welcome break for weary travelers from a drab stretch of I-35.

A park home to some unusually large rocks.