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