Diurisu

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Diurisu, the land of eternal happiness. In a world similar to Earth in geography and languages lives a number of creeds of all species imaginable, waging war amongst each other for a reason that has been lost in history. All the countries in the world have been fighting since their birth, except for one. That one is Diurisu. A long time ago, a rebel faction split away from the war to set up a base in an abandoned country, only to discover a source of underground water that appears free from contamination, despite direct contact with the dirt. Drinking this water led to them forgetting all of their most violent worries. As remaining people flee their wartime homes for the country, they too find happiness, but it comes quicker than drinking some water. A viral spreading of happiness and peace comes to those who enter populated areas of this rising country, almost as if there's a magic aura when entering. People with any intent are instantly calm and forget what war in the outside world is like. Nobody wants to leave, and the country expands. A utopia in the heart of dystopia, et regnabit pacem.