Can you build past a river?
Err, am I just missing it, and it's obvious? I have a city near a river. In fact it's on three sides. I can't build across to the other shore? I built a pier, and figured I'd be able to build on the tile adjacent to it on the other side of the river, but clearly I can't. Is there really just no way to do it, unless you happen to have, some way to build AROUND to the other shore or something of that nature?