This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.

A clear blue swimming hole with hidden caves, still unexplored.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

Nature's biggest mammal swims in landlocked Oklahoma.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

The folks at the Devil's Rope Museum want you to get hooked on barbed wire history.

This refurbished gas station is one of the oldest in Texas, located on the original Route 66.

This highway overpass was named after the tragic disappearance of a young mother who got mixed up with the wrong people.

This graveyard is home to the so-called "Witch's Circle."

It may take some time to locate, but it's sure to warm even a heart of stone.

A Christian-themed amusement park and complex rocked by scandals.

A plaque on the base of this statue holds a bewitching design.

Secret refuge and museum of the Duke of Florence.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This massive library holds what was once the largest book collection in the world.

This museum explores the lives of Chang and Eng, the "Original Siamese Twins."

This North Carolina grave is the final resting place of the world's most famous conjoined twins.

The site of the one and only battle of Lord Dunmore's War.

Amphibious mascots display a quirkier side to this luxury hotel's rich history.

This historic, one-acre island is the only legal place to camp in the city of Richmond.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.