Driving over the Bay Bridge south from Berkeley to San Francisco. The bridge does not go all the way across the bay. There are actually two bridges; the first from Berkely to Treasure Island, and then another one from Treasure Island to San Francisco. There used to be a military base on Treasure Island. Now there are homes. I never heard of Treasure Island before. You can see a little bit of the San Francisco skyline in the lower right of the picture. I think it costs $3 to cross the bridge.