A friend of mine found this on the internet and pointed it out to me. They are pictures that are made up of literally hundreds of individual photos taken from the same place but at slightly different times. They have then been overlaid and stitched together, kind of like a panoramic picture, but showing lots of movement and different views.
I can’t believe the levels of detail and interest that are in these pictures, they seem so dynamic and show so many different things that you could look at them for hours and still not have seen everything.