Structure

This page lists generated structures in Minecraft. A generated structure is defined as any structure that is disabled when the "Generate structures" world creation option is turned off. Some structures, such as dungeons and desert wells, do still generate with this option turned off; however, they are listed on this page due to them having the appearance of an artificial structure as opposed to a natural formation.

Overworld
The Overworld contains numerous generated structures, at a wide variety of scales.

Underground structures
{| class=wikitable ! Structure ! Biome(s) ! Description ! Rarity
 * style="text-align:center" | Any
 * A maze of corridors supported by wooden beams, with incomplete rail systems on which minecarts with chests can generate. Cave spider spawners may generate here heavily surrounded by cobwebs. In Badlands biomes, they use dark oak planks instead of oak planks, and may generate close to the surface.
 * Common
 * style="text-align:center" | Any
 * Maze-like stone brick structures containing many rooms, including one with a usually unactivated end portal frame. They have a specific, fixed way of generating, and a maximum of 128 can generate in a single world.
 * you dont find one
 * style="text-align:center" | Any
 * Maze-like stone brick structures containing many rooms, including one with a usually unactivated end portal frame. They have a specific, fixed way of generating, and a maximum of 128 can generate in a single world.
 * you dont find one
 * you dont find one

Buildings
Buildings are usually semi-large structures that generate above ground. They can contain valuable treasure but may contain traps, puzzles, and hidden areas as well.

Miscellaneous structures
These structures generate even when the "Generate structures" world option is disabled, and also cannot be located with the command.

The Nether
The Nether, though equally vast, contains far fewer generated structures than the Overworld.

The End
The End is the final and most barren dimension, with no generated structures on its main island. After defeating the ender dragon, gateways to the outer islands are created.

Technical details
Structures are generated for a given chunk after the terrain has been formed. The chunk format includes a tag called that indicates whether structures whose point of origin is in that chunk have been generated. If it is false or missing, it generates again. Structure generation is based on what is already in the chunk, so (for example) flagging a chunk that has already been populated for repopulation approximately doubles the amount of ore in it. When structures are generated, they can spill over into neighboring chunks that have been previously generated.