Don't blink or you'll miss it.

The remains of a boarding school designed to forcibly assimilate Native American children.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

The first steel dam in the world and the only one still functional in the United States.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Legends surround this jagged rock formation in the New Mexico desert.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

A riverside tiny house with books and other treasures galore.

Two tall rocks sit at the center of this site, once the home of a large Ancestral Puebloan community.

No one knows exactly how deep the world’s deepest geothermal hot spring is.

This Native American settlement dates back to the Pueblo II period.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.

A short but powerful waterfall resides amid Colorado’s Great Sand Dunes.

The hallowed remains of a 900-year old Ancestral Pueblo great house.

A quiet rock and botanical garden is the beautiful centerpiece of Fort Lewis College.

A historic building houses one of the most important archaeological institutes in Europe.

An important example of architectural history slowly decays in the city center.

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

Legend says this sacred tree was a gift from goddess Athena.

A museum of natural history, Edwin Carter's original log cabin home and workshop houses taxidermy specimens.

Above Breckenridge, a destructive mining technique sits sunken in a small pond.