A river runs through this remote valley in a very unexpected way.

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

A seven-story 1920s mausoleum outside Denver houses thousands of remains.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

Once a year, at exactly 11:11 a.m., this monument comes to life.

See massive fossils that are over 200 million years old in northeastern Arizona.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A famous flea market artist's studio that's full of odds and ends.

Recycling meets art in this colorful barricade.

A wealth of pop culture statuary and green chile dishes give this roadside restaurant clout.

The winter home of thousands of beautiful snow geese and sandhill cranes.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

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

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.