We just learned about a Lava Fountain.
A lava lake is a large crater or hole filled with lava.
Sometimes lava lakes happen after an eruption that just fills up a crater,
and sometimes they happen because lava flows along the ground and fills up a hole.
![lava lake](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Erta-ale_lac-de-lave_2001.jpg/640px-Erta-ale_lac-de-lave_2001.jpg)
(from: wikipedia - lava lake)
Kid Facts - Blast from the past: Atom