Is your city crawling with camera-toting tourists? Compare it with other photogenic cities using Sightmap, a sightseeing popularity heatmap that uses crowdsourced data to determine the most photographed place in the world.
The data comes exclusively from Panoramio, a photo-sharing site that regularly supplies photos to Google Earth. So, take the results with a grain of salt. It doesn't account for photos shared to other corners of the internet, or - *gasp* - photos that not shared online at all.
As you may have deduced, the brighter areas indicate more photos being submitted in that place. Zoom in to explore somewhere you've never been, through the lens of others. Popular places also include links to Wikipedia and Foursquare among other sources.