The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

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

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

This massive home was constructed by one of the greatest conservationists in Colorado history.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

A roadside attraction filled with an astounding array of gloriously wacky vehicles.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

Unlike most arches, this geological oddity formed in a volcanic dike.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

A fake mine that was made using real mining techniques which is also used as a community center.

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

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

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

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

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

A famous flea market artist's studio that's full of odds and ends.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Thousands of mounted insects, and some live ones, hide within an otherwise ordinary shopping mall.

This high desert botanical garden is a unique display of Northern New Mexico's geology.

Curios, scientific antiques, oddities for sale.

A unique arch graces the Dolores River Canyon near the Hanging Flume.