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

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

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.

The most confusing clock in New York.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.