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

America's only nuclear missile silo open to the public.

This historic national park is covered in the stunning ruins of red rock pueblos.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

An homage to everyone's favorite prehistoric cartoon family.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

A sharp bend in a dramatic river canyon cut through red rocks.

There aren't too many operational funiculars around, but Pittsburgh has two!

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Originally built as a promotional giveaway, this suburban house was designed to be an IRL version of the Simpson home.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Go inside to really appreciate this 500-year-old technological masterpiece.

2300-year-old Roman road connecting the empire.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The celebrated eyesore created by starry-eyed sweethearts.

This demon atop the Notre-Dame de Paris looks utterly bored.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.