The oldest surviving botanic garden in the United States.

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

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

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

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

One of the oldest of its kind.

An Irish Memorial commemorating those who perished due to potato blight.

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

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

Yo, Adrian!

Dr Barnes' $25 billion private collection of art and arboretum.

Century-old shop, specializing in Occult products.

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

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

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

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

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

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

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.

Huge masonic hall in Philadelphia with lavishly themed rooms.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.