The first permanent memorial to a unique secret weapon of World War II.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

This small, unassuming street is now a canvas for color and creativity.

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

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

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

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

The unusual burial monument of Arizona's first governor.

Fire meets ice at the southernmost volcano on Earth.

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

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

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.

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

An out of this world experience.

A glacier pocked with ice caves and surrounded by rainforests.

Southern Ocean waters and glacial forces transform the Antarctic ice into these stunning bridges and caves.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

Scientists use one of the saltiest bodies of water on Earth as a terrestrial base for studying water on Mars.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

Natural time capsule containing an alien ecosystem.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

These passages carved from the Antarctic ice hold strange shrines to the harsh southernmost climes.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.