Gaming x news.com
Deep Dark is a cavernous biome usually born in the overworld below Y=0 world height. It is a dimly lit biome covered with all kinds of skull blocks. As far as the crowd is concerned, naturally only wardens can be born here.
To find the deep dark biomes, the natural way involves going on mining adventures and exploring below Y=0 until you get to the Skulk facilities.
Then, you just have to follow the characteristics of the skull to discover the entire biome. But if you don't want to go the traditional route, there is an alternative way as well.
If you enable cheats in your world, you can use the following command in your chat to find the deep dark biome: /locate biome minecraft:deep_dark
Unfortunately, this command only exists for the Java version. We expect an alternate command to arrive in Minecraft 1.20, but there's no confirmation.
In any case, using the above command will reveal the coordinates to the nearest deep dark biome. You can then travel or teleport into Minecraft to access the biome.
Like Deep Darkness, Ancient City also spawns under the overworld only under Y=0 world height. But it is always born in a vast open area that can accommodate its size.
Not to be forgotten, even though this is the only structure that originates in a deep dungeon biome, not every deep dungeon has an ancient city.