Underground Cabin

Underground Cabins are small subterranean structures generated at world creation. They are themed after the biome they are found in, being built with blocks that represent that biome, and contain the appropriate chest type that carries all the special loot. Often they also contain pots for additional loot. Chests found in Underground Cabins require no keys to unlock, and contain an assortment of accessories, potions, weapons and coins. Underground Cabins also contain various furniture items such as statues, tables, chairs, bookcases, kegs, looms, pianos, extractinators, and chandeliers. Many paintings can in particular be obtained only from Underground Cabins.

Trivia

 * Underground Minecart Tracks can occasionally run through an Underground Cabin, making the cabin looking like a train stop.
 * In worlds, half of all Underground Cabins will have their blocks and walls replaced with Rainbow Bricks. Any flowing water touching the aforementioned rare cabin will also cycle through the colors and appear as rainbow.