I was thinking of all the terms I'd already used (river, lagoon, pond, stream, etc.) and then it hit me, like a Chuck Norris roundhouse!! With 30 seconds to spare! Haha, fun quiz!!
Most annoyingly me for me I was working on a quiz based on this very theme. Amazingly though I came up with quite a few different answers. Maybe I should publish it.
City, county and state sort of feel like the odd ones out. I'm flexible enough not to be bothered by them, I can see a case being made for it, but yea, geographical terms ok, but not (natural) geographical features ( which is indeed not the name of the quiz, before people all jump on me "what, are you stupid, that is not what it is called!" I am merely just noting they felt slightly different to me. Actually I might as well have not typed any of this, but since I have, it would be wastefull not to post it haha. Have a nice day :) )