Photo: Glorious Light - Lee Brusa
Wide-angle lenses. So fun. The above photo is an extreme (but fun) example of how wide-angle photography can be approached.
When you shoot with wide-angles and fisheyes there are certain things that happen. Naturally, much more is included in the shot. It allows you to get much closer to your subjects.
Something you definitely have to take into account is distortion. To see this, look at the edges of the photo above. You'll notice that proportions and perspectives seem as though they're stretched.
The photographer used this to their advantage and used the rocks to frame the shot. It serves as a border emphasizing the lighthouse even more. Keeping the ocean and lighthouse in the center of the frame keeps the distortion from affecting them. If they were distorted the horizon line would've been bent rather than straight.