No sooner spoken than broken.
#2's easy and obvious answer was of course "a River" I took some heat for making it too easy, but once you know they answer to one it always seems easy and obvious. This seems very easy to me, but I hope it's a little more challenging.
I have been enjoying the fact that people actually bother to answer these. I am going to try and consistently put some up here. If you have any you want to share send them to firstname.lastname@example.org