I have a draft beer system in my house.
One thing I liked to do was save my kegs (i.e. don;t turn them in for the $10 deposit) until I had enough for a "free" barrel.
At one point in time I had about a dozen so I made "Beerhenge" in my yard out of empty kegs.
My wife just shook her head. She must have been too impressed to speak.
