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

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

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

The world’s first penitentiary, meant to be humane, drove men insane.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

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

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

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

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

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

The site of one of history's most indelible and horrific tragedies.

This replica of the Greek structure is in the heart of Nashville.

The site of the one of the most deadly train wrecks in American history.

This award-winning men's bathroom was just too beautiful to not allow women to see.

One Confederate statue that accurately reflects the ugliness of its subject.

Live long and prosper in Tennessee.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

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

World War II bunker still standing on the New Jersey beach.

Step inside Lucy, the world's largest "elephant."

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.