This church on a Tohono O'Odham reservation has stood since 1797.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

Millions of years of erosion created the feature for which this rock formation is aptly named.

The remains of a large pueblo village constructed by the Salado culture, who occupied the region more than 600 years ago.

A Wild West jailhouse that slid down the mountainside.

Take a monster truck tour around an ostrich farm in the middle of the desert.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

The remnants of a creative early method of wildfire prevention.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

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

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

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

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

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

An homage to everyone's favorite prehistoric cartoon family.