Well, this rock was zigging so I had to go zagging. :)
This is from 8 years ago at Death Valley at the Race Track. At the time there was the occasional rock being moved or replaced, but it wasn't too common as it is now where I would guess less the 10% of the rocks are on their original tracks...
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.