Looking at a map of France, Paris is located in the North of the country. The river Seine runs through the city. Because of the riverbeds, the city is relatively flat. Montmartre hill is the city’s highest point geologically: 130 meters above sea level.
As you can see on the map below, the historical center of Paris is located on two islands; Île de la Cité and Île Saint-Louis. Île de la Cité is the historical core of the city.