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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

A museum of anything and everything Stooge.

Mysterious rocks that ring musically when struck.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

One of the world's largest model railroads is a mind-boggling achievement.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.