Geauga Lake in Aurora, OH. For a short period of time I think it was the largest amusement park by area. (There’s a pretty thorough history of it here) Almost all of it is fenced off and inaccessible by motorcycle, but the sea of parking had some wooden bollards I could drive around and get in.
I think I went here once as kid, but I don’t remember much of it. It was extremely ambitious, but ultimately it was located in the middle of nowhere and within 100 miles or so of Cedar Point, which is much more well known.
Also, since I haven’t had my GTA for a year or so I figured I should finally change my avatar