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

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

When ecosystems collide in the arid Southwest.

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

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

An experimental, automotive replica of Stonehenge.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

The final resting place of a 19th-century gold prospector and convicted cannibal.

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

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

A downtown park built on top of unclaimed graves.

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

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Rebuilt remains of a temple to Roman god Mithras.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A controversial memorial at the place where Captain Cook met his violent end.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

This simple, broken column marks the final resting place of one of America's most famous explorers.

A massive sea stack famous for its appearance in The Goonies.

A Roman-style column in Oregon hides a spiral staircase inside.