An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

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

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

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

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

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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

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

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

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.

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

Surrounded by industrial sprawl, a small monument marks the site of William Penn's first landing in Pennsylvania.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

This Great Depression-era creation was once known as the strangest house in the world.

The oldest surviving botanic garden in the United States.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

These medicine cabinet staples are part of the museum's collection of everyday objects.

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

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.