It's already afternoon in downtown San Francisco. It's convenient to take a bus from Union Square to Koiteta. San Francisco buses are basically 2.75 people, we must get a good ticket, because paid a ticket can be free unlimited bus rides in 4-5 hours, very convenient and cost-effective. The tower, not far from Chinatown, was built on a hillside with a tall Columbus statue on it. You can climb the tower, but you have to buy tickets, like 10 yuan per person, and you have to wait in line for more than half an hour, so we didn't go up. Under the tower, you can actually see the scenery of San Francisco. You can see the Golden Gate Bridge, the Bay and the downtown of San Francisco at a glance. You can also drive up, but there aren't many parking spaces on it and it's hard to park.