Metaphors are a powerful part of the ways in which we think. Metaphors provide us with a way of characterising the new and of reconstructing the familiar.
Here is a way of thinking about metaphor and landscape.
Start by thinking of a dog: make a list of things that a dog does, essentially a list of verbs and verb phrases. You might include: wags its tail, barks, growls, runs, shakes itself, rolls over, jumps up …. And so on.
Now use those verbs to describe the sea. I first came across this idea in a writing workshop. James Reeves uses the metaphor of the sea as dog in his poem ‘The Sea’.
https://www.poemhunter.com/poem/the-sea-36/
You could stop there, but you could move on to writing about a landscape you know well. I am thinking about the woods where I walk regularly. I think that I might like to write about it as a bird, a woodpecker, perhaps, or a wren.

It’s up to you.