Four cars from the old system were once on display, but were removed in 2014.

This outpost of America's most popular fast-food restaurant is housed inside a palatial mansion.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Go inside to really appreciate this 500-year-old technological masterpiece.

The celebrated eyesore created by starry-eyed sweethearts.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

A collection of the best toys ever made, The National Toy Hall of Fame is filled with kids, fun, and for some reason, a bird preserve.

Museum dedicated to the struggles of the disabled.

A historic presidential getaway on the continental United States' southernmost island.

A monument celebrating the idea of reaching inaccessible places.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

This landmark cemetery in Boston was created more than 300 years ago.

The site of Paul Revere's historic two lantern warning.

The fairy tale castle of the "fairy-tale king."

The oldest continuously inhabited street in America.

A graffiti Mecca welcoming artists from around the world.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

An eccentric playboy's astounding natural history collection.

The mark of the Devil's horns on a marble column in Milan.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A little sculpture with a large wardrobe.