Taipei, officially known as Taipei City (/ˌtaɪˈpeɪ/; Chinese: 臺北市 or 台北市; pinyin: Táiběi Shì; Pe̍h-ōe-jī: Tâi-pak Chhī), is the capital of the Republic of China (Taiwan). Situated at the northern tip of Taiwan, Taipei is located on the Tamsui River; it is about 25 km (16 mi) southwest of Keelung, a port city on the Pacific Ocean. It lies in the Taipei Basin, an ancient lakebed bounded by the two relatively narrow valleys of the Keelung and Xindian rivers, which join to form the Tamsui River along the city's western border. The city proper is home to an estimated 2,618,772 people. Taipei, New Taipei, and Keelung together form the Taipei–Keelung metropolitan area with a population of 6,900,273. They are administered under three municipal governing bodies. 'Taipei' sometimes refers to the whole metropolitan area, while 'Taipei City' refers to the city proper. Taipei City proper is surrounded on all sides by New Taipei.
Taichung (臺中 or 台中; literally 'Central Taiwan'), officially known as Taichung City, is a city located in western Taiwan, with a population of just over 2.6 million people, making it the third largest city on the island after New Taipei City and Kaohsiung. On 25 December 2010, it merged with Taichung County to form a single special municipality. The city's motto is economic, cultural and international city.
Hualien County (Chinese: 花蓮縣; pinyin: Huālián Xiàn) is the largest county in Taiwan in terms of area, and is located on the mountainous eastern coast of Taiwan. It is the northern terminus of the Hualien-Taitung Line and the southern terminus of the North-Link Line of the Taiwan Railway Administration. In terms of the Provincial Highway System, Hualien County is connected to other counties via the Suhua Highway, Huatung Highway, Hualien-Taitung Coast Highway and the Central Cross-Island Highway. Hualien County is famous for tourism. Tourism spots include the Taroko National Park and Yushan National Park and its coastline is well suited for biking purposes.
Kaohsiung City (Chinese: 高雄市; pinyin: Gāoxióngshì; Pe̍h-ōe-jī: Ko-hiông; old names: Takao, Takow, Takau) is one of the five special municipalities under the administration of the Republic of China (Taiwan). Located in southern-western Taiwan and facing the Taiwan Strait, it is by area the largest municipality, at 2,947.62 km2 (1,138.08 sq mi), and second most populous (by urban area) with a population of approximately 2.77 million. Since its start at 17th century, Kaohsiung has grown from a small trading village, into the political, economic, transportation, manufacturing, refining, shipbuilding, and industries centers of southern Taiwan. It is a global city with sufficiency as categorized by GaWC in 2012
There are several offshore islands around Taiwan. The economic development of those islands is slower than the main island due to the inconvenient transportation. However, the natural resources and cultures are preserved. We can see the beautiful beaches with the bright sky in Penghu, the history of war between China and Taiwan in Kinmen, and the aboriginal culture in Lanyu. Although we have to go there by planes or boats, if this is the second time you come to Taiwan, we highly recommend you to visit one of them!