Erosion and time have created a naturally-formed water park.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Ute tour guides have been sharing the ancient dwellings and rock art inside this large park with visitors for more than 40 years.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Legends surround this jagged rock formation in the New Mexico desert.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

This painting of a beloved dog will be on display at the Scottish National Gallery at long as the museum exists.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

Now home to a drinking establishment, this building has a macabre history.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The most loyal of little dogs, or a Victorian era publicity stunt?

This small museum in a 17th-century building honors three iconic Scottish writers.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The oldest continuously-operated inn in the United States, once owned by Henry Ford.

The haunting ruins of Jack London's dream house.

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

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

The eroded core of an ancient volcano is now accessible by a short hike.

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

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