Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A towering bronze statue memorializes the founding father of postwar American conservatism.

A museum and tribute to a brave profession.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

The unusual burial monument of Arizona's first governor.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A geological mystery on Camelback Mountain.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

A mysterious "wedding cake" castle in the middle of the urban desert.

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

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

A self-built castle made by a mysterious man.

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

This sun-scorched lakebed contains samples of half the natural elements known to humankind.

The world’s largest concentrated solar plant generates as many problems as megawatts.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

The most isolated mailbox in America lets desert travelers record their passing.

This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.

Four hundred granite steps were built into this massive rock by the National Park Service.

A B-17 bomber stands as a memorial to the residents of Tulare County who served in World War II.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.