Google also does that. They integrate panoramia pictures in some locations.
Go to "Old Tucson Studios" in google maps (not the preview). Grab the man and drag him to a spot on the map. You will get pictures of the different buildings. In some you can click on other areas which will transition to another picture a different person too. You can move around like this. It's all from public pictures.
Google hasn't integrated this into the preview yet, so they clearly don't know what to do with it yet.