With the latest Star Wars movie arriving in cinemas this Friday it is a good time to look at filming locations for the previous Star Wars films.
First, here is a nice site describing most of the locations in Tunisia. However, for a much more comprehensive list of global locations there is site appropriately called Star Wars Locations, where you can find a KML file of all the locations on that site. When exploring the locations be sure to turn on the photos layer, as for many locations the satellite imagery is not very good and most locations do not have Street View. Wikipedia also has quite a comprehensive list.
You can also explore the world via Street View as seen from the cockpit of several Star Wars vehicles using this site
We weren’t able to find out much about the locations for The Force Awakens locations. Wikipedia says filming took place in Abu Dhabi, Iceland, Ireland, and Pinewood Studios in England. We also found this article that shows some locations, but isn’t very specific.