A stealthy Apache hideaway that became the haunting site of a mass grave.

This sanguine boulevard was named after a deadly cowboy bar fight.

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

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

The world's first commercial spaceport is a disappointment of cosmic proportions.

A wacky, UFO-shaped house in a suburban neighborhood.

Huge spherical rocks in the middle of the prairie.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

An artificial crater field that trained astronauts for lunar exploration.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

A mysterious spirit totem at the edge of Navajo lands.

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

A reproduction of earth's many biomes.

An urban laboratory.