France covers approximately 548,000 km² in Western Europe, with a population exceeding 66.7 million in mainland territory. The country holds 56 UNESCO World Heritage sites, including Mont-Saint-Michel, the Palace of Versailles, and the banks of the Seine in Paris. The capital, Paris, concentrates most of the country's political, economic and cultural life, while Lyon, Marseille and Bordeaux rank among its major regional cities. A republic comprising 18 regions, five of them overseas, France stands out for the diversity of its landscapes, from Atlantic and Mediterranean coastlines to mountain ranges and river valleys, as well as for a gastronomic and artistic heritage recognized worldwide.