The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

There must be a pun in this haystack somewhere...

A whimsical, but often overlooked clock in Park Avenue.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Set sail on a small scale.

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

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

A toxic ghost town sitting atop a massive coal fire.

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

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

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

Arlington Cemetery exhibit dedicated to death and grieving.

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

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

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

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

Century-old shop, specializing in Occult products.

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

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

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