An unlimited water source in Minecraft is a water source block that will never run out of water. This can be useful for a variety of purposes, such as creating automatic farms, building underwater bases, or simply providing a reliable source of water for your home.
There are a few different ways to create an unlimited water source in Minecraft. One way is to place a water source block next to a lava source block. The water will flow over the lava and create an obsidian block, which will prevent the water from flowing any further. This method can be used to create an unlimited water source in any biome.