The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

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

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

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

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

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

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

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

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

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

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

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

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A unique sculpture park that specializes in the huge and bizarre.

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

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

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

One man's lifelong obsession with death.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.