250-year-old farm now features sculptures, a petting zoo and a hippy-bazaar.

"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."

Mysterious stone tower featured in many alternative histories of the New World.

The first American home of the isolated, egalitarian religion has a trove of Shaker architecture and artifacts.

The Hudson River School comes alive at this palatial estate.

Why have you never heard of the second most popular tourist site in New York?

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Oldest synagogue in the United States.

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

An architecturally unique lighthouse that had to be lifted up and moved to avoid falling in the sea.