This abandoned Victorian-style house was built in 1884.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Alexander Hamilton’s creation caused quite a bit of controversy.

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

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

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

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

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

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

A completely round house designed for the Atomic Age.

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

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

The Decoy Capital of the World.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

These old doors are covered in the signatures of Rehoboth Beach artists dating back to the 1930s.

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

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

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

Fascinating museum dedicated to the under-appreciated medical history of urology features some wince-inducing devices.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

These abandoned waterworks are crumbling into the Potomac River.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.