Here’s a template for making what looks like either a launch platform or entrance to a chamber of some sort. At any rate, Warhammer 40K fans will find it useful.
Hedgerow Photo Tutorial
The One of My Men Became Restless Blog has a photo tutorial on making hedgerows. I have threatened for years to make hedgerows, and yet never seem to find the time.
Using Epoxy To Make Realistic Eyes
Here is an article on using epoxy to make some cool looking eyes. Beyond the horror applications, however, I think the same technique could be used to make some very nice looking markers for wargames.