Monaco is a sovereign city state, with five quartiers and ten wards, located on the French Riviera in Western Europe. It is bordered by France's Alpes-Maritimes département on three sides, with one side bordering the Mediterranean Sea. Its centre is about 16 km (9.9 mi) from Italy and only 13 km (8.1 mi) northeast of Nice, France. It has an area of 2.1 km2 (0.81 sq mi), or 208 hectares (510 acres), and a population of 38,400, making Monaco the second-smallest and the most densely populated country in the world. The country has a land border of only 5.47 km (3.40 mi), a coastline of 3.83 km (2.38 mi), a maritime claim that extends 22.2 kilometres (13.8 mi), and a width that varies between 1,700 and 349 m (5,577 and 1,145 ft). The highest point in the country is at the access to the Patio Palace residential building on the Chemin des Révoires (ward Les Révoires) from the D6007 (Moyenne Corniche street) at 164.4 metres (539 feet) above sea level. The lowest point in the country is the Mediterranean Sea. Saint-Jean is the longest flowing body of water, around 0.19 km (190 metres; 0.12 miles; 620 feet) in length, and Fontvieille is the largest lake, approximately 0.5 ha (5,000.00 m2; 1.24 acres; 53,819.55 sq ft) in area. Monaco's most populated quartier is Monte Carlo, and the most populated ward is Larvotto/Bas Moulins. After a recentexpansion of Port Hercules, Monaco's total area grew to 2.02 km2 (0.78 sq mi) or 202 hectares (500 acres); consequently, new plans have been approved to extend the district of Fontvieille by 0.08 km2 (0.031 sq mi) or 8 hectares (20 acres), with land reclaimed from the Mediterranean Sea. Land reclamation projects include extending the district of Fontvieille. There are two ports in Monaco, Port Hercules and Port Fontvieille. Monaco's only natural resource is fishing; with almost the entire country being an urban area, Monaco lacks any sort of commercial agriculture industry. There is a neighbouring French port called Cap d'Ail that is near Monaco.