Hi Diane , those "red streets" you see in Mexico City, you will also find in some other mexican cities . What you see are the roofs of tents of hundreds of small "shops" inside a nomad market. These markets move arround the city through out the week and occupy a given street just during a scheduled day of the week. So if you look for them when the photo update comes you will not find them there anymore unless the new photo was taken the same weekday as the previous one. Saludos from México