Bandung (/ˈbɑːndʊŋ/) is the capital of West Java province in Indonesia. According to the 2015 census, it is Indonesia's fourth most populous city after Jakarta, Surabaya, and Bekasi with over 2.5 million inhabitants. At the meantime, Greater Bandung is the country's third largest metropolitan area with over 8 million inhabitants. Located 768 metres (2,520 feet) above sea level, approximately 140 kilometres (87 miles) southeast of Jakarta, Bandung has cooler year-round temperatures than most other Indonesian cities. The city lies on a river basin surrounded by volcanic mountains. This topography provides a natural defense system, which was the primary reason for the Dutch East Indies government's plan to move the colony capital from Batavia (modern-day Jakarta) to Bandung.