The Ocean
I was in high school the first time I saw the ocean. Now, living on an island, I can hardly not see it. The shore feels to me like the portal to an alien world. You look out at the horizon, and you imagine the thousands of miles between you and the next dry land, and you realize that most of the world looks like that. The planet as it really is bears little resemblance to the greens and browns we are used to.
