The cinder cone volcano with a less than complimentary name.

This golf ball–shaped former desert real estate office now houses a UFO museum.

An artificial crater field that trained astronauts for lunar exploration.

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

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

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

See massive fossils that are over 200 million years old in northeastern Arizona.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

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

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

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

Rippling sand dunes frozen in the Arizona rock.

The hundreds of movies and television shows shot in this high desert town are commemorated in a unique museum.

Bill Murray bowled three straight strikes here at Reno's "Taj Mahal of Tenpins."

A world-class collection of mechanical musical instruments and automata.

Vintage cars and motorcycles race for glory in a throwback motorsport celebration on the Jersey shore.

This sculpture garden in Death Valley makes you feel like you've slipped into some alternate reality.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

A museum of anything and everything Stooge.

This elaborate towering structure was once famed for its revolutionary height.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.