European castle ruins in an American state park are actually the product of death and grief.

An extravagant western hotel where every floor is the "ground floor."

A chessmaster's dream destination.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A massive sea stack famous for its appearance in The Goonies.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

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

The largest source of fossilized insects anywhere.

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

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

When ecosystems collide in the arid Southwest.

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

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

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

There are eight natural springs around town, each with a slightly different taste.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

This Chinese-style quartz sundial was saved in its final hour.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

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

A sculpture of a salmon swimming through a brick building.