This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

The site of a classic series of Laurel and Hardy pratfalls.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

America's most famous piece of self-built architecture.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Historic funicular railway, believed to be the shortest railroad in the world.

Pompeii's less famous neighbor is still revealing her secrets.

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

The site of the deadly Triangle Shirtwaist Factory Fire.

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.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

The only castle in North America to ever house European sovereigns.

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

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

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The celebrated eyesore created by starry-eyed sweethearts.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Only hotel where you can legally launder money.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.