Waterfalls + Natural Cold Frogs Spawn

Waterfalls: These would be a sub-biome where water flows vertically; occasionally, the water could extend into nearby rivers or oceans. Waterfall areas could feature elements such as: 

- Natural generation within forests, plains, or mountains

- Small to medium-sized deposits of cobblestone and mossy cobblestone, along with patches of grass and coarse dirt

- Adaptation to the surrounding biome's color palette, trees, and vegetation

- Natural spawning of Cold Frogs in groups of 2–3