Da Vinci's equestrian statue, 500 years in the making.

The writing studio of an American adventure author, built in the style of a medieval castle.

What was once the largest NFL stadium.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

This ancient theater was once the home of fierce gladiatorial battles.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

This shallow cave got its name from copious amount of human bones found inside.

One man’s vision of living among dinosaurs credits Jesus Christ as the engine of biological evolution.

This bridge was constructed from the rubble of the infamous Bastille.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

The palatial McDonald's that inspired Wesley Willis.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Strange physical sensations and optical contradictions keep visitors coming back for more.

This freshwater spring fills with 10,000 gallons of water per minute.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

Even in death, he's still your huckleberry.

World's largest Christmas store.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Former self-sufficient mental institution now a planned community.