Minecraft wiki entry for Forest, associated text: Forests are one of the most preferred biomes to start a survival world, serving abundant amounts of wood, grass and flowers, water, and passive mobs, and they do not have many dangers aside from the usual hostile mobs. Tamed wolves can help fight against hostile mobs, making them especially useful for when players lack resources for armor. The density of the trees, however, can obstruct vision and get a player lost quickly; random surface-level lava pools are possible, albeit rare, and start forest fires when close to trees.