Monaco (; ), officially the Principality of Monaco , is a sovereign city-state and microstate, located on the French Riviera in Western Europe. France borders the country on three sides while the other side borders the Mediterranean Sea. Monaco has an area of and a population of about 37,800; it is the second smallest and the most densely populated country in the world. Monaco has a land border of , a coastline of , and a width that varies between . The highest point in the country is a narrow pathway named Chemin des Révoires on the slopes of Mont Agel, in the Les Révoires Ward, which is  above sea level. Monaco's most populous Quartier is Monte Carlo and the most populous Ward is Larvotto/Bas Moulins. Through land reclamation, Monaco's land mass has expanded by twenty percent. Although small, Monaco is very old and quite well known, especially because of its status as a playground for the rich and famous, who are a spectacle for tourists and an economic engine in the Mediterranean. In 2014 it was noted about 30% of the population was made up of millionaires, similar to Zürich or Geneva.