The River is a technical biome that can be found in every biome except the End. Although they have no current, they usually serve as dividers for biomes.
If they are in a biome with a temperature level of 0.0, they will become a Frozen River instead.
- Rivers in the Nether are Lava.
- Water Rivers can still be created in the Nether using the actual water block from the cheat /give <username> 10 <# of items>. However, this cannot be done with a bucket of water, as the water will simply evaporate, leaving players with an empty bucket. This means that the nether cannot be farmed for obsidian by simply placing water buckets.