Ancient human, animal, and geometric figures drawn in the earth.

A geological mystery on Camelback Mountain.

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 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 former utopian healing center created by a huckster and built by derelicts.

An artist's vision for connectivity spans seven continents and 16 countries.

Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

Explore 10 acres of environmental sculptures.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

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

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.

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

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

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.