This is a sort of make shift park area under a billboard near I-75 in Mexicantown
This is the now abandoned 3th Precinct.
[dfunk reader Mac adds: “Hey DF, the old 13th precinct was up on Woodward & Hancock wasn’t it? The one in your picture looks like the old 3rd (?) down on vernor?” – correction made. ]
Here’s a great architectural style – the Geodesic Dome !
This property is on the market right now I believe.