Golden Gate Bridge
Do yourself a favor and see the Golden Gate Bridge the way it was meant to be seen: from below. Start at the Marina end of Crissy Field, an airfield-turned-recreation-area-and-bird-refuge in the Presidio. Here, you could spend hours watching the kiteboarders skim over the waves—and crash spectacularly into them—but keep walking west, past the fishing pier (take a moment to look for seals in the water), to Fort Point, the brick Civil War–era fortress guarding the mouth of the Golden Gate. Now look up.