

A secret underwater grotto where a red wooden treasure chest sits in rippled sand, ringed by pink and purple coral and small tropical fish. Two square stone-framed windows set into the carved grey rock formations hide the finder squares, while the twisting rock arches and coral branches carry the modules. The dark blue rock against bright turquoise water gives the pattern strong contrast, and the fine coral detail is spread evenly across the scene. A small hanging lantern and a golden medallion on the chest add a quiet touch of adventure.