Colonia, the old city of Uruguay, is a world cultural heritage site. This small city that was first established by Portugal was constantly robbed and changed hands by colonial powers Portugal and Spain in the following one or two hundred years. Therefore, today the entire old city still retains both Portuguese and Spanish architectural styles. For example, a cobblestone street with a hollow in the middle, such as a Portuguese-style tiled road sign. . . Although the church in Figure 7 has been rebuilt several times, it is still considered the oldest building in Uruguay. Retro vintage cars can be seen everywhere on the street. It is the weekend. Basically all shops in the old city are closed. There are few pedestrians on the road. The whole city has only 20,000 or 30,000 people and most of them live in the new city. It feels like a contract for a city by one person. Standing on both sides of the street, very comfortable!