A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

This downtown Dallas art installation is always on the lookout.

Yo, Adrian!

Possibly the smallest church in the world floats in the middle of a pond.

Ruins of a once-prized railroad station in New York.

A forsaken wonder in the middle of the East Side neighborhood.

The site of William McKinley's tragic assassination is only marked by an underwhelming boulder.

Created by four famous men (Henry Hobson Richardson, Frederick Law Olmsted, Calvert Vaux and Thomas Story Kirkbride), the beautifully designed Buffalo State Asylum was resurrected as a hotel and art center...but still boasts a ghost story or two!

Quite possibly the last cross all humans will ever see.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.