After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

This abandoned bootleg attraction was built to cash in on the popularity of classic TV show, F Troop.

The lost ruins of the forgotten ferry lie hidden beneath the silt.

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

Legend says train robbers stashed their gold within the depths of this unusual cave.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

The cinder cone volcano with a less than complimentary name.

A geological mystery on Camelback Mountain.

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

A Wild West jailhouse that slid down the mountainside.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This sanguine boulevard was named after a deadly cowboy bar fight.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Collection of vintage trailers double as hotel rooms.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

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

A motel dedicated to Southwestern nostalgia.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

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

Limestone caves with spectacular showcase chambers.

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