A giant time capsule not scheduled to be cored until 2040.

A monument marks the location of the first successful steamboat demonstration.

This university transit system is a 1970's vision of the future.

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

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

The way these carnivorous dinosaurs are posed is an homage to a classic work of paleoart.

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

The final resting place of many of New Jersey's most famous residents, including U.S. history's most in-vogue antagonist, Aaron Burr.

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

A giant ball made from pieces of an old Jeep.

This beloved marketplace mascot poops money and grants good luck.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

A diorama of the Civil War, fought by cats.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.