A burning tree - model from the article Set your battleground on fire - applications of the fire modelling technique
A site dedicated to 28mm miniature wargaming, with tutorials for constructing terrain from synthetic fur (teddy-bear fur) and other materials. Lots of photos of 28mm miniatures for WWII and sci-fi.
Make a forest or grass template for you miniature wargame! Yes I am a nerd.
Awesome, easy, cheap DIY wargaming trees
Terrain tutorial Making Haystacks. With a mat
Alcal's Arnhem. - what a great table to play on