Taipei is the political, economic, educational, and cultural center of Taiwan island, and one of the major hubs of Greater China. Considered to be a global city, Taipei is part of a major high-tech industrial area. Railways, Taipei Metro, high-speed rail, highways, airports, and bus lines connect Taipei with all parts of the island. The city is served by two airports – Taipei Songshan and Taiwan Taoyuan. Taipei is home to various world-famous architectural or cultural landmarks which include Taipei 101, Chiang Kai-shek Memorial Hall, Dalongdong Baoan Temple, Taipei Zoo, National Taiwan University, Hsing Tian Kong, Lungshan Temple of Manka, National Palace Museum, Presidential Office Building, Taipei Guest House, Ximending, and several night markets dispersing over the city. Its natural features such as Maokong, Yangmingshan, and hot springs are also well known to international visitors.