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.

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

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

A technicolor place of worship for Elevationists.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This naturally-sourced hot spring is now home to a clothing-optional resort.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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 bronze replica of half-consumed salt lick honors a quirky town tradition.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Small Nevada town embraced its designation as the "Armpit of America" with an Old Spice-sponsored festival.

A land of debatable treasure.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

A Nevada mining boomtown that ran out of silver and luck.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

A hidden gem of a saloon in the middle of a ghost town.

This vintage animatronics show is the Vegas version of a walk through the woods.

The farthest you can be in the contiguous U.S. from a McDonald's location.

This former Mormon settlement is reemerging from the receding waters of Lake Mead.

This cave was hidden for thousands of years, storing the worldly goods of ancient Native Americans.