One of the world’s largest living advertisements is made out of pine trees.

The burial grounds of a secret society includes fences topped with fake Tesla balls.

Purdue students would lean over this iron fence to skirt campus rules against smoking and courting.

The giant stump of the once towering cottonwood where Ute people held tribal meetings.

This unimaginably large pile of sand near Nazca is one of the tallest dunes in the world.

Did Inca children also slide down these smooth rocky slopes above Cusco?

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

Frank Lloyd Wright died a year before construction on his largest public project even began.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Where the author wrote her beloved "Little House" books.

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

Illegal drag racing two stories beneath Chicago’s streets.

Home to the deepest rift anywhere on Earth.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

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

It would be easy to walk past this unusual piece of art and have no idea it pays tribute to the odd life of a real chicken.

The final resting spot of the Colorado Transportation Department's beloved unofficial mascot.

A massive volcanic plug is now a protected area that hosts a number of bird species.