This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

The skeletal white beams stand as a monument to religious dissent.

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.

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

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

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

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

“You better take care of me Lord, if you don't you're gonna have me on your hands.” ― Hunter S. Thompson, Fear and Loathing in Las Vegas.

Even in death, he's still your huckleberry.

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

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

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

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

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

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

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

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

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

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

The "mysteries" of this quintessential roadside oddity were almost destroyed by neglect but were saved by fans of kitschy wonder.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.