Minecraft wiki entry for Best_biomes_for_homes, associated text: This is the only place that dark oak trees can naturally spawn. These thick trees allow players to chop a single tree down for more than half a stack of wood, plus saplings and rarely apples. Also, dark forests will occasionally spawn woodland mansions when sufficiently far away from the world spawn point. However, in addition to all of the problems with living in a regular forest, the area underneath the trees is often dark enough for monsters to spawn even in daytime, making this biome rather dangerous, especially for beginners.