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

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

A geological mystery on Camelback Mountain.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

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

A spiritual vortex among the red rocks in Sedona.

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

A motel dedicated to Southwestern nostalgia.

See massive fossils that are over 200 million years old in northeastern Arizona.

A self-built castle made by a mysterious man.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Home with Gothic windows featured in a famous painting.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

This racially troublesome eatery thought a new coat of paint could erase its offensive connotations.

Giant novelty guitars now mark the spot where Robert Johnson is said to have sold his soul to the devil.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

This replica of the Greek structure is in the heart of Nashville.

This cave holds a surprisingly colorful variety of geological oddities.