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

A promising candidate for the lost rock laid by George Washington was unearthed, but the hunt is still on.

Century-old shop, specializing in Occult products.

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

The first American department store, and home to the largest operating musical instrument in the world.

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.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

Descendants of this colonial Pennsylvania family still travel from far and wide to visit the 300-year-old home of their Quaker ancestors.

This might just be the TARDIS of bookstores.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.