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

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

A museum and tribute to a brave profession.

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

A geological mystery on Camelback Mountain.

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

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

A Wild West jailhouse that slid down the mountainside.

A spiritual vortex among the red rocks in Sedona.

An urban laboratory.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

A faithful reproduction of Al-Jazari's enormous water clock.

This indoor ski resort has a mountain contained inside a mall.

Sacred Buddhist home of some spiritual monkeys.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

Last stop before the top of the highest peak in the world.

Jumping-off point for a climb up Mt. Everest is the most dangerous airport in the world.