How to Find an Ancient City

Ancient cities generate only in the deep dark biome at Y -51, and the deep dark usually sits under mountains, so the quickest way to find one is to enter your seed in our ancient city finder and dig down at the listed coordinates. Without a seed tool, go to a big mountain range and explore the deepest caves beneath it until you find sculk.

Where do ancient cities spawn in Minecraft?

Ancient cities are large underground structures in the Overworld. The Minecraft Wiki says they generate only in the deep dark biome, at Y -51. Two cities cannot overlap, but they can generate right next to each other.

The deep dark itself sits deep underground in the deepslate layer and sometimes reaches up into stone. It forms most often under mountain areas with low erosion.

Fact	Value (from the wiki)
Dimension	Overworld
Height	Y -51
Biome	Deep dark only
Size	About 220 blocks across on each horizontal axis
Structure ID	ancient_city
Main danger	The warden

Which surface biomes have a deep dark under them?

Knowing what is above the deep dark helps you guess where to dig. The wiki lists the mountain biomes where it generates most often, and the places where it almost never appears.

Deep dark is common under	Deep dark is almost never under
Jagged peaks	Rivers
Frozen peaks	Oceans
Stony peaks	Windswept biomes
Groves	Swamps
Snowy slopes	Mangrove swamps

So a wide mountain range is a good sign, while an ocean or a swamp is not worth digging under. The deep dark is also the only Overworld biome where lava lakes cannot appear, and no regular mobs spawn there. The warden is the only hostile mob that spawns naturally in it.

How do I find an ancient city with a seed map?

Ancient city positions come from your seed and version, so a tool can calculate them before you start digging. On MC Seed Maps:

1. Get your seed. On Java Edition, type /seed in chat and click the number to copy it.
2. Open the ancient city finder, paste the seed and pick your Java version.
3. Enter your current X and Z. The finder lists the nearest ancient cities with a /tp button and a small map for each.
4. Optional: open the seed map, switch on the ancient city layer and compare the cities with the mountain biomes above them. Click a marker to copy a /tp command and mark cities you have looted as visited.
5. Confirm with /locate in a test world (see below), then travel in your real world.

Positions are predictions based on world generation from the open-source cubiomes library. Terrain can occasionally stop a structure from generating. Java 26.3 support is labelled Verified: it passed our in-game tests.

How do I confirm an ancient city with /locate?

On Java Edition, open a copy of your world with cheats on and run:

/locate structure minecraft:ancient_city

The game shows the X and Z of the nearest city (the Y appears as ~, since /locate ignores height for structures) and how far away it is. You can click the coordinates in chat. The command needs permission level 2.

Because the city sits at Y -51, dig a staircase down at the X and Z you get. Stop regularly to listen and look: the moment you break into sculk, slow down.

How do I find an ancient city without a seed map?

It takes longer, but you can do it in pure survival:

• Pick a big mountain range. The deep dark is most common under jagged, frozen and stony peaks, groves and snowy slopes.
• Go deep. Follow large caves down into the deepslate layer. You are aiming for Y -51.
• Look for sculk. Large patches of sculk with sculk veins around them mean you are in the deep dark. Sculk sensors, shriekers and catalysts also appear there.
• Watch for built blocks. Gray wool floors, deepslate blocks, soul lanterns and candles mean you have reached the city itself.

If you find the deep dark but no city, keep exploring the biome. The city only generates inside it, but not every deep dark area has one close by. This is where the ancient city finder saves hours.

What is inside an ancient city?

An ancient city is a huge structure built around a central palace with long corridors. The wiki highlights several things you will not see elsewhere.

Feature	What to know
Portal-like frame	Made partly of reinforced deepslate, which you cannot obtain in Survival
Wool floors	Gray wool with blue, light blue and cyan rugs that reduce vibrations
Sculk shriekers	Much more common than in the normal deep dark
Hidden basement	Rooms with redstone under the city centre
Chests	Echo shards, disc fragments, armor trims and golden apples, including enchanted ones

Ancient cities are also one of only two places where sculk sensors generate naturally.

How do I stay safe from the warden?

The warden is the big risk. It comes out of the ground when sculk shriekers have been triggered enough times; the wiki says a warden emerges once four shrieker warnings have gone off. It also gives nearby players the Darkness effect.

Ways to lower the risk:

• Sneak whenever you can and avoid running over sculk sensors.
• Stay on wool floors and rugs, which were placed to dampen vibrations.
• Plan a route around shriekers before you start looting.
• Keep an escape route and some blocks for quick walls.

Are ancient cities in the same place on Bedrock?

Our tools do not calculate Bedrock structure positions. For most structures, the same seed places them differently on Bedrock, so our Bedrock seed map shows biomes only. If you play Bedrock, confirm any city position in-game in a test world before you commit to a long dig.

Quick checklist

• Ancient cities are only in the deep dark, at Y -51.
• The deep dark is most common under large mountain ranges and almost never under oceans, rivers or swamps.
• Fastest method: the ancient city finder, then dig a staircase down.
• Confirm with /locate structure minecraft:ancient_city before a long trip.
• Sneak, stay on the wool and avoid shriekers to keep the warden away.