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

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

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

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

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

The oldest surviving botanic garden in the United States.

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

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.

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

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

Where America's first doomsday cult awaited the end of the world.

A layered tribute to the work of mosaicist Isaiah Zagar.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

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

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

Wedged between two sets of row houses is an awkwardly located family graveyard.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

Meet some of the most prominent figures in Black history through life-sized wax models.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

George Washington's dentures and Queen Victoria's dental instruments are in the nation’s official museum of the dental profession.

An abandoned church gets a second life as a massive beer hall and event space.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.