I found these plastic cutting mats at Aldi for about $5 for a six pack.
They have this rubber antislip surface on the underside, so instantly though they'd be great material for scenery bases.
I made a couple of dungeon tiles by sticking some egg carton straight onto it. I was going to bulk it up a bit so it could line up with dwarven forge stuff ... but I was impatient. Turned out great. Hot glue gun sticks to the cutting board material like a champ!
Using it to
ase the desert scenery.
Thus is the sound of da town guard!