Small World Productions has a short tutorial on making rivers for your wargames table.
Modeling
A Easy Method For Making Wargames Roads
Small World Productions has a short tutorial on an easy method for making wargames roads. They look pretty good.
Largest Model Railroad of Russia
For some great eye candy, here is a video of what bills itself as the largest scale model railroad of Russia in the world. The layout features many of that country’s iconic buildings and sites.