The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

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

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

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

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

A replica of the flagpole that gave a frontier town its name.

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

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

The first steel dam in the world and the only one still functional in the United States.

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

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

Formerly frequented by Hollywood stars and now open for tours.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

A series of labyrinths in the Nevada desert inspire meditation and calmness.

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

A Saint Nicholas-themed ghost town in the Mojave desert.

Don't blink or you'll miss it.

The remains of a boarding school designed to forcibly assimilate Native American children.

A tribute to the statues of Easter Island along Route 66.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.