The first picture can clearly see that is the entrance to the underground street, and the second one is the underground street. It is a bit like the tunnel we said. Now in Guanajuato, many places still walk like this underground street. The third one is a street just out of the underground street. Guanajuato The traffic is really congested. The streets are very narrow and there are a lot of cars, but it is amazing that there is not much traffic jam.