This fabulous site has collated images from Google Maps and asks for you to vote for them. Not much of an activity in that, however the discussion and inquiries that could come from looking at it are endless.
My personal favourite is the image from Greenland. I’d put the image up on my projector and have my students try to figure out where the image was taken. They would need to analyse the image, make some choices based on what they see and rule out a whole lot of possible options. Now that is a rich activity….