Collection of skeletal systems from the "world's leading supplier of osteological specimens."

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

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

This shrine is an ode to the region's rich Hispanic heritage.

Home of mutant livestock.

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

This nearly abandoned town was once a thriving mining community until a series of fires.

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

This interpretive path lets you get up close and personal with dinosaur bones.

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

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

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

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

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

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The magic's in the hole!

A museum dedicated to the alleged Roswell Incident.

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

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.