A mountainous landscape with green slopes, glistening rivers, lakes, and amazing purple trees, where Bing and Bong experience various aspects of weather, wind, sun, rain, and snow. They find out how to keep dry in wet weather, and warm in the cold. Here, too, they learn the secrets of tracking Flockers, the relative size of eggs, the art of communication, and how big and small creatures see the world in very different ways.