The Schild en Vriend site has a nice article discussing hills, mountains and cliffs on the wargames tabletop
Terragenesis has an article on building laboratory equipment for mad scientists. The photos show an amazing use of various household and electronics bits.
Tim’s Wargaming Blog has a photo tutorial on making “36 Miles of Barbed Wire.”
This is a great video on modeling an abandoned farmhouse or shack for your wargames table.