Minecraft wiki entry for The_Nether, associated text: Beds explode and cause fires when a player attempts to sleep in one. It has an explosion power of 5. The explosion is larger than that of TNT, which has an explosion power of 4. They cannot be used as a respawn point.
One has to use a powered respawn anchor to respawn in the Nether, but when it runs out of charges, the player once again respawns in the Overworld.
There is no way to place liquid water in the Nether without the use of commands, except inside a cauldron. These can be used to put out a player on fire, but are difficult to center oneself in.
Using water buckets produces steam particles and a hissing sound, leaving the player with an empty bucket.
Ice that is melted or smashed in the Nether does not produce water.
A wet sponge instantly becomes a regular sponge when placed.
If somehow placed using cheats or when placed inside a cauldron, water takes on a reddish-brown color.‌[Bedrock Edition only]
Lava flows twice as far (eight blocks) and six times as fast in the Nether compared to Overworld, basically water's equivalent flow characteristics from the Overworld.
Grass blocks and leaves take a dead-looking brownish color because the Nether is dry and hot.
Maps generate a brown-gray static pattern. The player's direction indicator spins randomly; its location is still relative to the player's location in the Nether, except in the New Nintendo 3DS Edition, where it is always in the center of the map. Usable significantly for lava ocean travel via strider. Putting the map in the off-hand minimizes the map to help see one's strider footing.
Clocks spin wildly, making it impossible to tell the time while in the Nether. Compasses also spin wildly unless connected to a lodestone, which they then point toward.
Snow golems rapidly take fire damage and die, due to the Nether being dry and hot. However, they can survive if they have the Fire Resistance status effect.‌[Java Edition only]