This giant disembodied horse head seems to balance impossibly on its nose.

Once on display alongside a giant Gumby, it’s as tall as a nine-story building when fully extended.

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

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

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

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

A legendary boxing venue and ring featured in Rocky V.

America's first serial killer rests in anonymity.

A layered tribute to the work of mosaicist Isaiah Zagar.

This beloved marketplace mascot poops money and grants good luck.

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

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

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

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

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

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

Yo, Adrian!

This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

This Birdsill Holly fire hydrant is the remnant of a very different type of hydration innovation.

A hurricane-stricken oak tree has been reborn as a beautiful chainsaw artwork.

A little piece of Paris in the sultry south of the U.S.

A unique post-modern public space in the middle of the Warehouse District in New Orleans.

The neighborhood surrounding the memorial was the epicenter of the AIDS epidemic in Louisiana.

Storyville was New Orleans' historic red light district and hotbed of jazz music, sometimes referred to simply as "The District."