We have mention this before you can find many interest diorama pieces at your pet store. Billy Hill has used them for his Golden Fleece display. Here are his thoughts.
The aquarium sections in PetCo and PetSmart are great places to find terrain pieces. They have buildings, bridges, ruins, all kinds of stuff. I found these various ruin pieces and even an entire temple. Barb crocheted the Golden Fleece for me and I added a head from a plastic farm animal.
Excellent! “Kill them!!!” Now you need a Harryhausen Hydra!