Bastion Remnant

Bastion remnants are large, castle-like structures that are found in the Nether in all biomes except Basalt Deltas. Piglins will spawn in this structure on generation. Hoglins may also spawn on generation in bastion remnants which contain hoglin stables, and a magma cube spawner will generate in bridge bastions. Bastion remnants are the only place where the Pigstep music disc, the snout banner pattern, and netherite scrap can be found naturally.

Generation
Bastion remnants are found in the following nether biomes:
 * Crimson Forest
 * Nether Wastes
 * Soul Sand Valley
 * Warped Forest

Structure
Bastion remnants generate as 4 types of structures: bridges (with lava underneath), hoglin stables, housing units, and treasure rooms. Each type has its own set of structures that compose it. These structures may be supported by ramparts which contain cave-like paths. Piglins and hoglins spawn frequently throughout.

All bastion remnant structures found below are located in the folder client.jar/data/minecraft/structures/bastion.

Bridge
The bridge consists of a large ruined rampart structure with a piglin face carved into it. The inside of the "mouth" consists of multiple levels of walkways surrounded by lava. A damaged bridge goes out from the mouth, with a support pillar on the far side.

Hoglin stables
The hoglin stables consist of a rampart with damaged hoglin stables on either side. Hoglin stable pieces are contained in the subfolder hoglin_stable.

Housing units
The housing units consist of multiple ruined towers arranged around a central courtyard with nether wart growing in the middle. Housing unit pieces are contained in the subfolder units.

Treasure room
The structure consists of a large wall supported by buttresses, with a bridge going between it and the treasure room itself. The treasure room consists of many bridges suspended above a lava floor. At the bottom of a treasure room, there is a magma cube spawner, and a center loot area. The center loot area consists of either blocks of gold or a nether wart farm. One or two chests will also generate which can spawn with damaged enchanted diamond gear. Treasure room pieces are contained in the subfolder treasure.

Trivia

 * $$, bastion remnants are the only places in the game where netherite-related items naturally generate (aside from ancient debris).