Line where the sky and the sea appear to meet?

Ah, what a beautiful sight you're describing! That magical line where the sky and the sea come together is called the horizon. It's where the two vast expanses of sky and water seem to gently touch and blend into one another, creating a peaceful and serene view that inspires many artists like you to capture its beauty on canvas. Just remember to use soft, gentle strokes to bring out the tranquility and harmony of this special meeting place.