This massive redwood tree has a hole in the base big enough to drive through.

Quite simply the largest tree in the world (by volume).

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The site of the climactic scene from the classic horror film is now a historic landmark.

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

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

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

One of the oldest of its kind.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

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

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

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

Yo, Adrian!

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

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

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

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

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

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

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

One of the oldest living oak trees in the Southeast.

The largest retailer of seashells in the world.