Recently I ran across this article on PetaPixel called Big City Heat Maps. A guy named Eric Fischer went and collect geolocation data from sites like Flickr and Picasa and created these maps. The blue points represents photos taken by the locals, red points are tourists and yellow are points taken from people that couldn't be determined. It really does shows the "hot spots" of these frequently visited cities and it's very interesting to see it this graphic form. It's even fun to point out the San Fran bridge and Alcatraz and the many spots in Paris. I think it could also stand alone and make some interesting art, especially for map lovers like me!
Photo 1: San Francisco
Photo 2: Paris
See other photos here at PetaPixel