where is it located?
It is located in northern central France, in a north-bending arc of the river Seine whose crest includes two islands.
Paris
Paris is located in northern central France, in a north-bending arc of the river Seine whose crest includes two islands, the Île Saint-Louis and the larger Île de la Cité, which form the oldest part of the city. 
what city in france has the highest population Paris
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Paris [SEP] Location
Paris is located in northern central France, in a north-bending arc of the river Seine whose crest includes two islands, the Île Saint-Louis and the larger Île de la Cité, which form the oldest part of the city. The river's mouth on the English Channel ("La Manche") is about downstream from the city. The city is spread widely on both banks of the river. Overall, the city is relatively flat, and the lowest point is above sea level. Paris has several prominent hills, the highest of which is Montmartre at . Excluding the outlying parks of Bois de Boulogne and Bois de Vincennes, Paris covers an oval measuring about in area, enclosed by the ring road, the Boulevard Périphérique.