I love architecture that mimics nature, but nautilus-shaped houses are sometimes a bit too wacky for my tastes. Instead, I like the subtle reference. Take this porch railing, for example. Instead of a boing, straight-as-an-arrow top rail, it's been outfitted thusly. The gently undulating rail mimics the shape of ocean waves, which residents can easily appreciate from a chair on the porch. The wavy rail adds an unexpected sense of whimsy and fun to the porch, and is perfect punctuation for a Summer getaway home.