Gers, traditional Mongolian tents, are seen on a hill in an area known as a ger district in Ulan Bator June 28, 2013. Approximately 60 percent of the population of Ulan Bator live in settlements known as ger districts and in many cases residents have limited access to basic services such as water and sanitation. According to a 2010 National Population Center census, every year between thirty and forty thousand people migrate from the countryside to the capital Ulan Bator. Ger districts in the city have been expanding rapidly in recent years. Mongolia is the world's least densely populated country, with 2.8 million people spread across an area around three times the size of France. Picture taken June 28, 2013. REUTERS/Carlos Barria (MONGOLIA - Tags: SOCIETY POLITICS ENVIRONMENT)

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