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

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

A museum dedicated to the alleged Roswell Incident.

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

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

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

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

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

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 pair of giant roadside arrows are all that remains of a former Route 66 trading post.

Ancient pueblos built into the base of a natural canyon wall.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A city continually buried under the ash of a volcano that has been erupting for more than 15 years.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

A safe place for the wild donkeys of a hot vacation destination.

A hugely vast Irish landscape of barren rock that stretches for miles.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

One of Ireland's most infamous prisons for rebels including men, women and children.

A six-ton wedding present for the King of the Scots.