The most beautiful place in the world I've been to is a place called Dephi Valley in Connemara on the west coast of Ireland. We were brought there on a school trip for a few days nearly ten years ago and it was an amazing experience. Everything about the place was so tranquil, you felt isolated and cut-off from civilisation but in a good way. It was an escape. The scenery is pretty awesome compared to where I live, which is flat and boring, you were surrounded by mountains, ribbon lakes and streams. I'd really love to go back there sometime and escape from society for a few days.
(Not my photos btw)
The buildings in the distance on the right in this picture is where we stayed. It's kind of like a mountain leisure resort.