Daejeon (Korean: [tɛd͡ʑʌn] (listen)) is South Korea's fifth-largest metropolis, with a population of 1.5 million as of 2019. Located in the central region of South Korea alongside forested hills and the Geum River, the city is known both for its technology and research institutions, and for celebrating its natural environment, with most mountains, hot springs, and rivers freely open for public use. Daejeon serves as a hub of transportation for major rail and road routes, and is approximately 50 minutes from the capital, Seoul, by KTX or SRT high speed rail.Daejeon is one of South Korea's administration hubs with the Daejeon Government Complex (Other administrative hubs: Seoul, Gwacheon and Sejong City). The Korean administration in the 1980s decided to relocate some of its functions from Seoul, the national capital, to other cities.