Hey Stardusted yes I know of one
I found it by chance when I logged onto
Stumbleupon.com when I clicked onto that link
from my email the page that came up was

calm.com

The screen was moving & had a waterfall with all those soothing sounds.
There are different scenarios:
A sunset w/the waves along with sounds of the ocean as it rolls up on the sand (my fave)
A field with the sounds of birds
And two others I'm not sure I didn't watch them.
calm.com also has these buttons you click onto for guided meditation for either 2 or 10 minutes. There is music too.
I have to say that it was weird that I got directed to this site.
But I just love it.