A lighthouse is a source of bright light on the shore that helps ships at sea navigate at night. With two lighthouses in view, one can determine their coordinates on a map quite accurately. If a lighthouse is placed near dangerous rocks, it will always be possible to see where they are to avoid getting too close. Also, in books and movies, something interesting always happens in a lighthouse.
Let's draw a tall tower standing among the rocks. At the top, we'll place a glass dome with a lantern. And to make the lighthouse easily visible during the day, we'll add red stripes to it. We can also add some clouds and seagulls.