Overview
The Nether is a compressed, lava-filled dimension reached through an obsidian portal, and the single most important thing about it is the coordinate ratio: 1 block travelled in the Nether equals 8 blocks in the Overworld. That makes a tunnel between two nether portals the fastest transport system in the game by a wide margin, and it is why almost every long-lived world ends up with a nether hub. Physically it is a closed box — bedrock floor at Y 0, bedrock ceiling at Y 128, a lava ocean at Y 31, and no sky, no weather and no day-night cycle. Water evaporates the moment you place it, which removes the fall-damage trick, the fire-extinguishing trick and the obsidian-casting trick all at once. Beds explode instead of setting a spawn, so a respawn anchor charged with glowstone is the only way to set a spawn point here. Five biomes generate: nether wastes, crimson forest, warped forest, soul sand valley and basalt deltas, each with a different mob set. The resources you cannot get anywhere else are ancient debris for netherite, blaze rods for brewing, nether wart, wither skeleton skulls, quartz and glowstone.
Netherite from ancient debris, blaze rods for brewing stands and eyes of ender, nether wart for every useful potion, wither skeleton skulls for the wither, quartz for redstone components, and 8-to-1 travel between distant Overworld bases.
What it is
The Nether is a hostile dimension of netherrack, lava and fire, reached through an obsidian portal. It has no day-night cycle, no weather, and no water — water placed here evaporates instantly.
A solid bedrock ceiling sits at Y 128, which is why the "nether roof" exists as a flat travel surface above the terrain.
Why players go there
Three reasons. First, travel: one block in the Nether equals eight in the Overworld, so a nether tunnel is the fastest transport in the game. Second, resources found nowhere else — ancient debris for netherite, blaze rods for brewing, nether quartz, wither skeleton skulls and glowstone. Third, the bastion and fortress loot tables.
Surviving it
Bring fire resistance potions, a shield, and never a bed — beds explode here. Piglins ignore you if you wear at least one piece of gold armour. Ghast fireballs can be deflected back with a well-timed hit.
Properties
The Nether runs Y 0 to Y 255, with a bedrock ceiling at 128 and holds 5 biomes and 4 generated structures. Distances here are 1 block = 8 Overworld blocks.
- Weather
- No
- Day-night cycle
- No
Biomes in The Nether
5 biomes generate in The Nether. Which one you are standing in decides the mobs, the structures and, in the Overworld, the weather.
Structures in The Nether
Ruined Portal (Nether), Nether Fortress, Bastion Remnant, and Nether Fossil generate here.
- Ruined Portal (Nether) — The Nether-side counterpart, generating on cliff faces, floors and ceilings throughout every Nether biome with the same crumbling obsidian frame and loot chest.
- Nether Fortress — A dark nether brick complex of corridors, staircases, balconies and long bridges over lava.
- Bastion Remnant — A ruined blackstone fortress in one of four layouts — bridge, hoglin stable, housing units and treasure room — each packed with piglins and, in the treasure variant, piglin brutes that ignore gold armour entirely.
- Nether Fossil — A large bone block skeleton protruding from the soul sand of a soul sand valley, resembling a fossilised ribcage or spine.
Guides and tools that cover this
Frequently asked questions
How do I get to The Nether?
Build a frame of at least ten obsidian — a 4×5 rectangle with the corners optional — and light the inside with flint and steel. Standing in it for a few seconds takes you through.
How big is The Nether?
It runs Y 0 to Y 255, with a bedrock ceiling at 128, and distances are 1 block = 8 Overworld blocks.
How to get it
Build a portal frame from at least 10 obsidian — 14 for a full frame — and light it with flint and steel. Ancient debris is mined at Y 15, and nether quartz generates uniformly between Y 10 and Y 117.
Tips
- Wear at least 1 piece of gold armour so piglins ignore you; without it every piglin in sight turns hostile.
- Never bring a bed — it explodes with roughly the force of a charged creeper and will kill you outright.
- A respawn anchor charged with glowstone is the only spawn point that works here, and it holds 4 charges.
- Divide your Overworld coordinates by 8 to place the matching nether portal. See nether travel and survival.