At this beautiful new site, Geocoded Art, landscape paintings are geocoded and can be searched with a map interface. Or you can look up a favorite work by artist or title, and find out where in the world it was painted. All works are in the public domain. This is already a rich database which hopefully will continue to grow. This will surely be a favorite for art-history courses, giving context to paintings. However the stated goal is also “to use fine art to illuminate geography”. Found this via Google Maps Mania.
Glad you see some appeal in this; we do indeed have plans for much more