In this post are pictures with the effect of Droste. Effect Droste - Dutch term that used to refer to a special kind of recursive picture. It was named in 1904 in honor of the package of the same name brand cocoa.
In the photo with the effect of Droste placed a smaller version of the same picture. Already reduced again located pictures shot still smaller size and so on. In theory, this process can go on indefinitely, but, in practice, limited-resolution photos.