Minecraft wiki entry for Lava_lake, associated text: A lava lake in a badlands biome.
A waterfall naturally generated on top of a lava lake, turning it into obsidian.
A lava lake in plains biome, starting a fire. Note the grass on stone blocks and above the lava itself.
A lava lake found directly on the surface of the world.
2 naturally-occurring lava lakes next to each other. Note the forest fire the lake on the left is not starting.
A lava lake spawned naturally, note the forest fire nearby.
A giant burning in a lava lake.
This cave intersected a lava lake, rather than hitting the lava level like is more commonly seen.
Snow layer generated on top of lava lake.
Lava lake in snowy taiga biome.
A lava lake that is burning grass.
A lava lake in a village.
A lava lake that is intersecting with an amethyst geode.