Caracas shares commonalities with many Latin American cities: densely populated and with limited space because it is surrounded by mountains. Because of this, the city has grown vertically. A very striking aspect is the number of people living in substandard housing built on the mountain slopes surrounding the city. This type of housing is called ranchos, built improvised, without any official planning, with deficiencies and inadequate materials, marking a difference between those who live in the valley proper, 45% of the population in 25% of the urban area lives in these settlements.