I made a town that is not "so flat". Most of the central European cities are not flat. Almost all were built on and around hills.

So I attempted to do a town with some hills, surrounded by mountains, a river, and a lake.

I am planning to put a starting adventure for D&D 5e in this town. There are some adventuring guilds in the town and there's plenty of adventuring to be done in the surrounding mountains :)