Trail Ruins

Trail ruins are buried structures that work as archaeological sites where suspicious gravel generates. They are found in heavily forested biomes and resemble ruined villages from a lost culture.[1]

The biomes the trail ruins can be found in are the taiga, snowy taiga, old growth spruce taiga, old growth pine taiga, old growth birch forest, and the jungle. In Bedrock Edition it is also generated in biomes with the tag has_structure_trail_ruins.

Trail ruins are the only structures where mud bricks, packed mud, and blocks of coal naturally generate.