The artists range from Leonardo Da Vinci to LS Lowry and the locations of artworks include fire stations, courts, libraries, a former nuclear bunker, London Zoo and a lighthouse - as well as major museums and art galleries.

BBC: Public paintings quest completed

Charles streetcar, visit the Audubon Aquarium of the Americas or Audubon Zoo and take a brief interlude at the New Orleans Museum of Art.

BBC: Daily deal: The charming heart of New Orleans

Mountain View just added 20 US museums to its battery of 10, 000 indoor schematics, including the de Young Museum in San Francisco, the Philadelphia Museum of Art, Cincinnati Museum Center, the Indianapolis Museum of Art, the American Museum of Natural History, 17 Smithsonian museums and the National Zoo in DC.

ENGADGET: Google Maps adds floor plans and walking directions for 20 US museums