Or stop by Greensburg on your way back to Pittsburgh for its Westmoreland Museum of American Art (www.wmuseumaa.org), featuring works by Winslow Homer and Mary Cassatt, among others.
Double back and head up a block to Venice Boulevard to visit the Museum of Jurassic Technology (www.mjt.org), a deadpan collection of genuine fossilized curios and phony artefacts that feels like collaboration between Dave Eggers and David Lynch.