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

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

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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

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

Yo, Adrian!

A rare view of a preserved Victorian science museum.

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

The humble field where the first Major League Baseball game was played.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

A museum of anything and everything Stooge.

Where America's first doomsday cult awaited the end of the world.

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.