An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

America's only nuclear missile silo open to the public.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

The show pony of cave systems, Fantastic Caverns manages to live up to its name.

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

Less a museum than a bizarre fantasy world created by artists and engineers.

Home of the International Space Hall of Fame.

One of the American Southwest's most extensive collections of Navajo rock art.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

This interpretive path lets you get up close and personal with dinosaur bones.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

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

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The holiday spirit lingers year-round in the "Christmas City of the High Plains."

Cannon designed to fire an atomic warhead.

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