21st and 824th Engineer battalions

[SonofaMP]

back to the mystery object

Judging by the men in the photo, i`d say its about a 5ft x 6ft oval, looks to be cast concrete.

My guesses:

 

1. some kind of decoritive mottif that got blown off a building

 

2. a well cover

 

3. they discovered the secret entrance to a Foo - Fighter base and they lassooed a FOO.