I used foam to make natural rock tunnel openings for the single train passages. Some now have precast stone look faces and some are still natural. I painted the foam with browns and grays to add some base color. Started to look like a real wall of dirt and stone. I decided to add a dead tree by the opening after an afternoon of pulling weeds proved to be a gold mine of tree stock. Roots make free and natural looking trees. I like free.....!!Back to home page...