Nature isn't just about living things, its about where they live too. Rivers are a source of life and can sometimes seem quite gentle and sometimes seem quite violent. We visited Porth Yr Ogof in South Wales, the place is full of caves and waterfalls. Sometimes the river disappears into a cave and then re-appears further downstream. Its a really wild and scary place.
This is Sgwydd Yr Eira, one of my favourite waterfalls. Its huge and the can walk right behind it and stick your head in the water if you need a wash!