A favorite cheap excursion: Oakland to San Francisco and back on the ferry ($4.50 each way if you buy a 20-ticket book). We had rain showers early in the afternoon, and then this fog blew in over the bay. Somewhere in this picture are a couple of 50-story tall bridge towers. After we passed under the bridge, the fog swirled away from a tower for a moment (below). We took the ferry back to the East Bay after dark, and later in the evening a front blew through and cleared out the clouds.