This is a tough, tough question.

I've been lucky enough to have traveled a little, so have seen a few beautiful places. I can't choose between;

The Norwegian fjords - Sailed here while working aboard a cruise ship. You just can't wrap your head around being on a boat and surrounded by actual mountains. We were there for the spring snow melt, so the waterfalls were astonishing.

Florence - Almost certainly the most beautiful city I've ever seen. Full of tourists, yes, but the buildings themselves are bona fide works of art. Good gelato too.

The Grand Canyon - I feel almost obliged to list this because to see it with your own eyes is something else. We got there just in time for sunset, when everything turned the most vibrant shade of orange. Trouble is, I just couldn't comprehend what I was looking at. Like, I knew it was the Grand Canyon, but it just so big that it may as well be an infinite view.

Palaiokastritsa (Corfu) - Corfu is a generally beautiful island, but Palaio has a monastery atop a steep hill that's 100% worth the walk. You can sit there in the little cafe drinking an ice cold drink, just gazing out over the Ionian Sea, or you can turn around and look across the dramatic hills.