I want to suggest the geo-art Les super-héros by skincell. A series of caches, building a superman logo. There is a total of 50 caches (37 mysteries, 13 multis). The riddles are easy, but if you expect another 50 film canister thrown into bushes, you are wrong. Except for a few, all containers are well camouflaged into the environment, creatively hidden and good craftsmanship work. We had much fun doing the tour (and it took us way more time than expected).