This series on Netflix is basically my favourite thing to have on in the background when I'm working or lounging or generally just being. The episodes are centered around deserts, flowers, oceans, waterfalls and forests, accompanied by a soundtrack by Ludovico Einaudi, Johann Johannsson and Gary Malkin.
The main reason I can't stop watching? They're soothing as hell. If you're thinking this is anything like that damn fireplace channel, it isn't. I watched the waterfall one first and that's the one that got me hooked into wanting to watch the other ones (and if you aren't into the sight of seeing waterfalls while it's snowing, then we can't be friends). It's also kind of nice to watch right before you go to sleep at night - there's something comforting about seeing these images before you go to bed.
If the above video link isn't working, you can see a trailer for the short series over here.