The Wargame Terrain Blog has a photo tutorial on making jungle terrain.
modeling
Modeling Swamp Trees / Cypress
Here’s a video on modeling cypress trees / swamp trees.
Plastic Legion’s Battle Board
Plastic Legions has some photos of a terrific skirmish battle board of some ruins set aside a sea. Wonderful stuff. I’d love to play a pirate skirmish game on this.
Modeling Tile Roofs
Tile roofs are a feature of buildings in a variety of regions and time periods. Here’s a good tutorial for modeling them.