Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

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.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

Even Henry David Thoreau found this glacial pothole irresistible.

One of the earliest bowling lanes in the U.S. doubled as a sewing school during a time when women had little job opportunity.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

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

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

A 60-room castle constructed by a horse-racing heir.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

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

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

Yo, Adrian!

Current docking place of the SS United States, the fastest transatlantic ocean liner.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

A celebrity from the late Cretaceous period.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

There’s a special club house at the top for the bell ringers.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.