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

This sidewalk tribute honors Colorado's great culinary creation.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A museum dedicated to the alleged Roswell Incident.

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

It's easy to forget what century it is as you wander this rustic homestead.

Birds with backpacks expedite film development for a rafting company on a remote Colorado river.

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

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

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

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

A museum of natural history, Edwin Carter's original log cabin home and workshop houses taxidermy specimens.

The symbol was surreptitiously built into the river bank by German prisoners of war.

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

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.

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

Once a year, thousands of naked cyclists flood the streets of a Seattle neighborhood.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

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

Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

The flock of plastic poultry is an ode to the classic comedy staple.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.