Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

Friction between grains of sand cause a curious "singing" sound.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

This landmark cemetery in Boston was created more than 300 years ago.

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

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

Current docking place of the SS United States, the fastest transatlantic ocean liner.

An Irish Memorial commemorating those who perished due to potato blight.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

Step inside Lucy, the world's largest "elephant."

One of the world's largest model railroads is a mind-boggling achievement.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

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

The site of one of history's most indelible and horrific tragedies.

A unusual sanctuary for abused and exotic animals in South Jersey.

Mysterious rocks that ring musically when struck.