World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

"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."

Dim sum, served in a grand old theater.

A priceless collection of the Nation's cryptologic history.

This tiny patch of arid sand sits in one of the greenest states in the United States.

The eccentric mansion of one of the most popular horror authors of modern times.

A pre-Columbian ceremonial and astronomical site built by the Taino Indians.

Hundreds of pieces of ancient Taíno art cover the walls of this Caribbean cave system.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.