The old city of San Diego is downtown, close to the station, with Bus and Green Line trains running and stopping. At the entrance of the old city, there is a white stone marking the old city. From here into the pedestrian street, there are souvenir shops on both sides. There are some small and exquisite souvenirs, as well as colorful Mexican clothes. We should slowly find out what we like. There is also a courtyard with Mexican-style performances and many people gathered to watch. There are many tall and peculiar cactus inside and outside the courtyard. The old city exudes a kind of leisure, some romance, a kind of amorous feelings...