A shrine of fire worship built on top of a natural flame.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A natural formation that resembles a camel resting in the New Mexico desert.

Famously misunderstood wonder of the ancient world

The taxidermied remains of a once-great parrot.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The celebrated eyesore created by starry-eyed sweethearts.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Home to the "Rat King" of Nantes and other wonders of the natural world.

At 207 feet, one of the world's longest continuous escalators.

The "lovely red Vega" of the legendary record-settling pilot.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A tribute to Ponce de Leon's supposed quest for eternal youth.

A building so large that it has its own weather.

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

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Florida castle built with aluminum printing plates.

Like Mardi Gras, only everyone's a pirate.

A Circus legend leaves an unexpected endowment.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.