This photo tutorial offers great instruction on modeling an Iroquois style Indian longhouse.
modeling
Sculpting An Urban Wall
A nice tutorial on sculpting and then making a mold of an urban wall.
Basing Trees
Here’s a photo tutorial on basing tree armatures.
Making Hills From Cork
Kevin’s Miniatures and Hobby Table Blog has a photo tutorial on making small hills out of cork.
Scenery Bits Photos
I was inspired by these World War I bits of scenery. I especially like the “rough ground” pieces.