Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

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

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

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

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

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

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.

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

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

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

This century-old painting of a portly 10-foot-tall man spent years hidden behind plaster.

Once an ancient sea, this landscape of rocky ravines is filled with the fossils of ancient marine life.

This massive marble memorial was built bit by bit either out of devotion or spite, but at the expense of the surrounding town.

This statue is an ode to an iconic roadside advertisement popularized during the 1970s.

A museum documents the development of the invention that tamed the Wild West.

The 55-pound trichobezoar was removed from the stomach of a cow.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

The holiday spirit lingers year-round in the "Christmas City of the High Plains."

A unique blue and yellow phone booth in America's "Little Sweden."

This artsy public restroom is shaped like a giant john.

Stories of sightless fish and ghostly cowboys are only a fraction of the legends surrounding this Kansas sinkhole.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.