Miami is actually a winter-free coastal city. Apart from sea water, sunshine and beaches, there are no scenic spots worth seeing in the city. Americans come here to spend their holidays lying on the beach in the sun. Summer is the off-season here, with fewer tourists, and the city looks cleaner. It is said that Miami was named "the cleanest city in the United States" in 2008 because of its good air quality, extensive vegetation coverage and clean water resources. The preliminary impression is that this evaluation is reliable, and there is no such a good comprehensive environment in that city in China at present. Miami City is not big, but public transportation is not cheap, bus $2.25, light rail $2.35. Fortunately, free buses operated by the government shuttle between suburban residential areas and urban areas all day, about 15 minutes a shift, which is very convenient. This kind of bus has the same appearance as the traditional tram, so the local people call it trolley. Sitting in this cool free car, I went to Pux Supermarket to buy food for two days. It was more expensive here than in New York. At noon, we cook and eat in our lodging. After dinner, we sleep until 3 p.m. He also went out to take a free bus into the city, traveling back and forth from south to north, and enjoyed the street scenery along the way, so as to avoid the heavy walking and sightseeing in the hot sun. The appearance of urban buildings is mainly grey and white, which is in harmony with the blue sky coconut trees and makes people feel relaxed and happy.