Sorry Charlie...you've obviously not been to Arlington. Both pretty darn green from lots of trees and plenty of hills in North Arlington.
However, the equipment, not the surroundings give away that it’s not Arlington’s Six Flags Park.
I’ve been to Texas many times, including Arlington. You’ve clearly never been to the south Atlantic states such as Georgia. The area of Arlington has natural trees, unlike some points further west in Texas, when you can tell you’re coming up on a town because there are trees and you know somebody had to have planted them, there aren’t any wild ones.
But, in comparison to Georgia or even east Texas the trees are getting more sparse and thinning out. As far as hills, Arlington might be hilly by Florida standards but it’s not by mine. Slight inclines don’t qualify to me. Those aren’t slight inclines in that fourth photo, and those wild trees are quite dense. That’s because the photo is of Six Flags Ovet Georgia, not Six Flags Over Texas.
Could also be the Six Flags outside of St. Louis. A couple of years ago they had just upgraded the old milder version (maybe 20 or 30 feet off of the ground) to something that takes you as high as the Superman ride. There was a long line, but it wasn’t moving. They’d take people up, spin them a bit, bring them down. Then guys with clipboards walked around checking seats and chains. We watched this process repeat itself several times and decided to skip this thrill.