Funny, this site calm.com is pretty much the opposite of Playak - no news, nothing to read. But at least it has a lot of water. I'm currently having the site open just for the background sounds - quite relaxing. Not sure how long I can leave it open before I have to go to the bathroom
Anyway, if you need 10 minutes of nature based relaxation whilst being stuck in an office, opening this site in fullscreen mode is pretty good:
calm.com