Opposite from the Bay Bridge, the city and bay lie to the left side. You can clearly see Yerba Buena/Treasure Island that grounds the eastern and western portions to the middle of the bay.
One last curve before embarking on the bridge, the city skyline splays out before you. Just to the west is the Marin headlands where some of the best views of the city and bridge are memorialized in postcards
After the southern tower, you have to pay your admission to enter San Francisco. This is the de facto practice for all bridges that span the bay and connect to the peninsula. You can leave freely but it will cost you to come back. Once you enter the city, you will be dumped off into The Presidio. This decommissioned army base is part of the Golden Gate National Recreation Area, GGNRA. It was open to the public previously but the buildings have now been made accessible to companies and organizations. Lucas Films has set up shop in one of the large complexes.