on this sightsmap it is possible to select rio de janeiro, and then open a variety of pictures posted by thousands of users - the color coding shows what areas have the most pictures, with yellow being the highest, zooming increases the number of pictures to choose from.

on this page by airpano, a variety of 360 panoramic pictures can be chosen via a small map with many points of interest - the photographs can be navigated via keyboard, mouse or touchscreen and   allow users to experience 360-degrees views of the city as seen from various landmarks