You'll pick up the Drowner's Map from an unfortunate submerged treasure hunter who was looking to claim the fabled water goblin's plunder for himself. Luckily for you, he wasn't successful and so ...

The full Kingdom Come Deliverance 2 map is right here - which, in fact, is two maps, one for the Trosky region and one for the larger Kuttenberg area you'll get to visit later on. KCD2's map is ...