Yo, Adrian!

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

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.

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

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

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.

The oldest surviving botanic garden in the United States.

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

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.

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

A rare view of a preserved Victorian science museum.

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

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

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

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

The cathedral of a controversial, conservative, schismatic sect that declared the Catholic Church heretical and founded its own succession of popes.

Whimsical sculptures and caves chiseled by nature over the millennia.

A wonderful collection of fossilized dinosaurs and other creatures that roamed the landscape millions of years ago.

This abandoned naval battery stood at the ready as recently as the 1980s.

Abandoned 18th century weapons factory in the Aezkoa Valley.