World Map Of Touristyness
Two websites that I frequent, Information is Beautiful and Flowing Data, have both posted a heatmap of where touristyness. More correctly, it is a heatmap of people using Panoramio to share their photos.
Bluemoon Interactive, a small codeshop, maps touristiness, based on uploads to Panoramio, a site where people share photos of their favorite places. Yellow indicates high touristiness, red is medium touristiness, and blue is low touristiness.