A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The site of the climactic scene from the classic horror film is now a historic landmark.

A submerged archeological park still holds the wonders of a Roman Sodom.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

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.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.