<p>The observation tower at the de Young Museum in <a href="http://travel.nationalgeographic.com/travel/city-guides/san-francisco-california/">San Francisco</a>’s Golden Gate Park offers sweeping 360-degree views of the city.</p> <p>“In a situation such as this it may be tempting to crop in on the cityscape,” says photographer Krista Rossow, “but adding the graphic elements of the architecture using reflections or shadows adds another layer of interest. A foggy overcast day made the reflections in this scene stand out and allowed for the mirrorlike reflection of the young woman visitor. On a day with direct sun, graphic elements in the composition would be created by shadows. As a photographer, start to pay attention to shadows, reflections, and patterns to see how the elements change at different times of day and with weather.”</p> <p>Read more about San Francisco in "The Social Network" in the April 2013 issue of <i>National Geographic Traveler.</i></p>