Here's the Road rug I made for our friend, Isaac. It features a lake (blue), a park (just below the lake, with a swingset, etc), the Zoo (see the animals?), McDonalds and Russ's (their grocery store), Their house (the white one), and their church. It was a blast to make!
1) Spray adhesive doesn't work. Sew it instead.
2) Sew from the top down. Even my nice Bernina really complained about sewing 4 layers of felt together.