A couple of rectangular boulders from the creek behind my house. Originally I did this with my iPhone, but the model was really poor. So I took the raw photos and re-processed it with Reality Capture and it came out much better. I then cleaned it up in Houdini to lower the poly count and fix any problems.
There are quite a few areas where there was no texture, so if you want to use it in a project, I recommend you bring it into something like 3D Coat to clone stamp in the areas that are missing textures.