Southeast Asia's Philippines, officially the Republic of the Philippines, are located in the Western Pacific Ocean. Manila, the nation's capital, is well-known for its waterfront and historic Chinatown. Because the Philippines was an American colony for about fifty years, its educational system is American. The Association of Southeast Asian Nations, the Asia-Pacific Economic Cooperation forum, the United Nations, the World Trade Organization, and the East Asia Summit all count the Philippines among their founder members. Also located in this nation is the Asian Development Bank's headquarters. The economy of the Philippines has demonstrated a remarkable shift from one based on agriculture to one based on manufacturing and services.