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

A local prank turned town icon.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

This beloved marketplace mascot poops money and grants good luck.

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

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

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

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

One man's lifelong obsession with death.

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

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

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

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

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

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.

Yo, Adrian!

The oldest surviving botanic garden in the United States.

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