Minecraft wiki entry for Water, associated text: Water naturally generates in the Overworld to form oceans, rivers and springs. It also generates in villages, desert wells, strongholds, woodland mansions, ancient cities‌[upcoming: JE 1.19] and ocean monuments. Technically, water generates below layer 63 by replacing air blocks that are not part of a cave or other structure, although some caves and canyons in the ocean biomes are intentionally filled with water. Water also occasionally generates as small puddles on the floor next to dripstone clusters.