some unknown artist must have stuck a finger in the earth to draw an image.

I didn’t know what this sentence menas when I was listening a article.

Who can help me?

Thank you

That is the sort of sentence that only makes sense in context, Sabrinayaa.
I presume some feature of a landscape was being likened to a drawing by a mythical giant artist.

Yeah, I think I should put this sentence in the article to make me understand better, but it’s a little difficult.