I believe it's at least one of the most beautiful places on earth. It's certainly one of the most striking.

I think there'd definitely be some beautiful angles. Striking/remarkable is a good way to describe it:

https://www.google.com/search?q=lake+powell+photos&tbm=isch&...

But it has very serious competition from dozens of places within even just a 100km radius!

It's a big world; you can find some people who believe just about anything.