This sidewalk tribute honors Colorado's great culinary creation.

A prehistoric rock shelter that's literally in someone's backyard.

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

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

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

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

Colorado's only true geyser is hidden within the San Juan National Forest.

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

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

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

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

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

A downtown park built on top of unclaimed graves.

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

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

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

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

The clock that sets them all.

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

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

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

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

A technicolor place of worship for Elevationists.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.