Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

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

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

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

In the early 1800s, surgery was also a show.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

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

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

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

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

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

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

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

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

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A rare view of a preserved Victorian science museum.

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