DaeguDaegu (tɛ̝.ɡu, ), formerly spelled Taegu and officially known as the Daegu Metropolitan City (), is a city in southeastern South Korea. It is the third-largest urban agglomeration in South Korea after Seoul and Busan; it is the third-largest official metropolitan area in the nation with over 2.5 million residents; and the second-largest city after Busan in the Yeongnam region in southeastern Korean Peninsula. Daegu and surrounding North Gyeongsang Province are often referred to as Daegu-Gyeongbuk, with a total population over 5 million.
Gyeongbu LineThe Gyeongbu Line (Gyeongbuseon) is a railway line in South Korea and is considered to be the most important and one of the oldest ones in the country. It was constructed in 1905, connecting Seoul with Busan via Suwon, Daejeon, and Daegu. It is by far the most heavily travelled rail line in South Korea. All types of high-speed, express, local, and freight trains provide frequent service along its entire length. In 1894–1895, the Empire of Japan and Qing China fought the First Sino-Japanese War for influence over Korea.
GyeongjuGyeongju (경주, kjʌ̹ŋ.dzu), historically known as Seorabeol (서라벌, shʌ̹.ɾa̠.bʌɭ), is a coastal city in the far southeastern corner of North Gyeongsang Province in South Korea. It is the second largest city by area in the province after Andong, covering with a population of 264,091 people (as of December 2012.) Gyeongju is southeast of Seoul, and east of Daegu. The city borders Cheongdo and Yeongcheon to the west, Ulsan to the south and Pohang to the north, while to the east lies the coast of the East Sea.
BusanBusan (pusan; ), officially known as Busan Metropolitan City, is South Korea's second most populous city after Seoul, with a population of over 3.4 million inhabitants as of 2017. Formerly romanized as Pusan (and Fusan before that), it is the economic, cultural and educational center of southeastern South Korea, with its port being South Korea's busiest and the sixth-busiest in the world. The surrounding "Southeastern Maritime Industrial Region" (including Ulsan, South Gyeongsang, Daegu, and some of North Gyeongsang and South Jeolla) is South Korea's largest industrial area.