Using "the" without referring to something before [duplicate]

I was surfing the Internet when I saw this sentence:

From there, you can see the beautiful scene where the sunset's reflecting over the ocean.

As far as I've known, "the" is used when you already have something written above, and you're referring it; or when you want to describe "only" things (e.g. the Moon, the Sun).

Is it correct to write the sentence like so? If not, will replacing the "the" in "the beautiful scene" with "a" fix the sentence?

Thanks for your answers!

"The" doesn't necessarily refer to something previously identified. Rather, it implies something that is (at least relatively) unique.