I've swum in some pretty cool pools before. In my favorite, I was able to watch the sun coming up over Grandfather Mountain, while swimming the north-bound leg of my laps. But this one is pretty unbelievable:

 Here's a page with 69 more: http://www.lovethesepics.com/2012/07/69-exquisite-infinity-pools-that-will-blow-your-mind/

Which one do you like best?