Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

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

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

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

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

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

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

Yo, Adrian!

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

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

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

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

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

Pennsylvanian mass grave and possibly mass murder.

The highest point in Delaware is located under a trailer so this marker across the street will have to do.

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 blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.