The alley connecting two of country music’s most historic venues has a rich history of its own.

This award-winning men's bathroom was just too beautiful to not allow women to see.

The oldest brick house in the state of Ohio.

One of the few beardless depictions of Lincoln, George Grey Barnard's 1917 statue was denounced by many—including Lincoln's own son.

Yo, Adrian!

The world’s first penitentiary, meant to be humane, drove men insane.

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

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

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

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

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.

One of the oldest of its kind.

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

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

This beloved marketplace mascot poops money and grants good luck.

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

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

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

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

A layered tribute to the work of mosaicist Isaiah Zagar.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.