An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

A Prada store in the West Texas desert that is never open for business.

Mysterious glowing orbs float through the desert night.

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

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

San Francisco’s condensed garden of incredible plant growth.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

The cinder cone volcano with a less than complimentary name.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A reproduction of earth's many biomes.

An urban laboratory.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

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

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.