ruins is responsible for generating a whole host of new structures in our Minecraft worlds. The vast majority of these new structures will appear dilapidated and guarded by enemies. Although not everything is ruinous. Some examples of these structures would be castles, ships, hot air balloons, and houses, among others.
Not all of these structures will be full of enemies either, as this is not a mod that spawns new dungeons, but rather ruins and other types of structures. Therefore, in those that are not enemies we can find hidden treasures, while those that are guarded by enemies will continue to have hidden treasures, but first we must destroy the enemies that protect them.