Cleaning Up the Woods

There was a very large pile of concrete laying in the trees. We thought there were two large pieces and a couple of smaller ones. Oh No! There was an entire truck load of large ones once we started unearthing these babies.
 
 We started moving the top ones and just kept uncovering more and more. Can't tell what they were used for. The bottom appears to be a square with rounded edges. There are strange pipes, holes cut out, and post supports in some of  them.

Off to the concrete recycling plant with this load. We  have one more load to get rid of. Those pieces haven't benn lifted out of the ground yet.