A waterfall and cave near Arroyo Seco that inspired the writings of D. H. Lawrence, Willa Cather, and Mabel Dodge Luhan.

This cheery fruit farmer welcomes visitors to a classic roadside emporium.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

A forsaken wonder in the middle of the East Side neighborhood.

The most isolated mailbox in America lets desert travelers record their passing.

A comprehensive collection of toy and model trains, largely from the mid-20th century.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The first mountain submarine had its initial and last voyage in 1898.

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

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

Paleoamericans built these ancient walls high in the Colorado Rockies as part of an extensive hunting system.

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

The burial grounds of a secret society includes fences topped with fake Tesla balls.

According to local legend, a tree grew from the stake that killed this alleged vampire. In reality, he probably died from influenza.

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

The final resting place of a 19th-century gold prospector and convicted cannibal.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The remnants of a 1970 plane crash remain high in the Rocky Mountains.

A museum and apothecary garden devoted to the history of frontier medicine.

Pirates had to be ousted from the land where this now ruined Louisiana fortress was built.

The crumbling ruins of this southern American fort have survived storms, war, and cults.