All of the cards in "world" set are sorta common looking things, that can be found either outside, inside or "inside" of the lighthouse.
You should find most of them pretty easily, the last one you have to find by exploring around, or by getting a drill or scissors.
If you still can't find all of them, let me know! I'm planning to add some sorta hints or a card-locator upgrade or something in in the future to make it a bit easier.