For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

This headstone-like marker inscribed with three words has been an utter mystery for over a century.

Daredevil repair workers can worm their way out the access hatch, loop ropes over the apex and rappel down the monument.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

A 24-hour vending machine restocked daily with homemade full-sized pecan pies.

The underground hideout of a Japanese soldier for whom World War II ended in 1972.

Thousands of abandoned statues of deities are taken to this hillside in southern Hong Kong.

A painfully obvious spy house sits right across the street from the Russian Embassy.

A Saint Nicholas-themed ghost town in the Mojave desert.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

Electrical pylon in the shape of Disney's beloved mouse.

A museum preserving one company’s history of preserving food.

The largest retailer of seashells in the world.