This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A crumbling hospital from the 1850s on Roosevelt Island.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

One part local history, 99 parts gruesome haunted house.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

An abandoned asylum where patients have been forgotten but their possessions remain.

For over 300 years this little carving has been the city’s good luck charm.

An oddly specific collection of handmade dolls remembers the women of the White House.

A gigantic collection of teeny, tiny books.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

This museum glorifies the humble potato.

Cat art as far as the eye can see.

A collection of 4,000 thimbles that's more versatile than one might imagine.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

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

After nearly 60 years, there's still a bear at Paddington Station looking for help.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A computer bug so primitive it was an actual insect.