The oldest surviving presidential residence in the United States.

One of Philadelphia's largest murals resides hidden under this bridge.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

The humble field where the first Major League Baseball game was played.

A curious building honoring past and current members of a historic musical comedy troupe.

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

This beloved marketplace mascot poops money and grants good luck.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

One of the oldest of its kind.

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

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

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

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

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

The abandoned coal loading dock is a canvas for unsanctioned art.

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

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

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

Dr Barnes' $25 billion private collection of art and arboretum.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

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.