Pretty straightforward question. Personally, I'd love a patrol in an iconic "ancient" city, such as New York, Hollywood, Tokyo, London, etc. I think it would be super cool to explore post-apocalyptic versions of cities that we're already familiar with. Also, a large patrol area filled with tons of tight corners, streets, buildings, and whatnot would be a nice mix-up from all the open areas we have now.
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Kennedy Space Center running east to the Florida swamps with lots of wildlife and 'gators who'll eat you or your enemies. Someplace you can get lost in for hours on end...