This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

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

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

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

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

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

This beloved marketplace mascot poops money and grants good luck.

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

This elaborate towering structure was once famed for its revolutionary height.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Yo, Adrian!

A daily replay of the experiment that proved the rotation of the Earth.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

This sculpture of a fisherman spent six years at the bottom of the Schuylkill River.

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

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

This might just be the TARDIS of bookstores.