Pathfinder has a Flip-Mat called "Forbidden Jungle" that has what you're looking for. One side has a small village of huts, and the other has a river winding through the jungle with a couple of overturned logs serving as impromptu bridges.
Here's the product link: http://paizo.com/products/btpy9qi7?Pathfinder-FlipMat-Forbidden-Jungle
Johnathan