One of my favorite settings is from Winston Graham’s novel, Ross Poldark, which takes place in the Cornwall region of England. In it, the sea forms a beautiful backdrop to the action, and is as much of a character as the humans. It is always there, always moving. Here’s a sample:
It was a bright day with a cold wind off the land. The sea was flat and green with a heavy groundswell. The long, even ridge of a wave would move slowly in, and then as it met the stiff southeasterly breeze its long top would begin to ruffle like the short feathers of an eider duck, growing more and more ruffled until the whole long ridge toppled slowly over and the wintry sun made a dozen rainbows in the mist flying up from its breaking.