Sea Warden's Ruined Keep

Publisher's blurb: An underwater temple, filled with cells and different locked rooms. Tiled floors look beautiful beneath dappled sunlight, while outside fish dart and corals cling to the rocks. With this map and its detailed one-shot adventure prompt featuring sea-life grown to enormous sizes due to a giantism potion, you’ll save so much time as you prepare for a fun session. The battlemap comes ready for both VTTs and easy home (or professional) printing—so you can use it no matter how you prefer to run your sessions!