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

The oldest continuously occupied public building in the United States.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A multi-storied adobe complex has been inhabited for more than a thousand years.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

When ecosystems collide in the arid Southwest.

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

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

This spectacular track has run continuously since 1882.

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

The largest source of fossilized insects anywhere.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

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

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

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

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

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

Massive still life just off the highway in Kansas.

A statue high in a hill that represents how Buffalo Bill got his name.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

A landscape of massive spherical boulders are the main attraction in this Kansas State Park.

Cannon designed to fire an atomic warhead.