I haven't tried a metal detector. What would I be looking for?
I have lifted it up on each side. While unbelievably heavy, it does lift up completely. It's awful sturdy for plants. The other one is just a 20' X 8' collection of 7 foot high posts which used to be wrapped with chicken wire. It has a few small trees in there, but nothing special. Nothing different then the rest of the woods! That one I could see as a planter, as it's much more simple.
Chieftain: our coop is fairly new so I really don't need another at this point. I was thinking I can cut a wide path down to this pen and clean up the area. If I replace the chicken wire and add a roof it would be good for quarantine since it's far enough away from the main coop. The posts on the other structure are in great shape, so I'll be sure to reuse them at some point!