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Solved! What is this cylinder I found buried in my backyard?
(reddthat.com)
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
Cleaning an unidentified rusty cylinder is something I would advise against.
Some vigorous grinding will surely solve the problem!
(That's a joke, don't do that)
It’s full of holes. And water. At least I think it’s water