Photo: Republic of Korea, Jeju
Wikipedia: Jeju Island (Korean: 제주도; Hanja: 濟州島) is the largest island in South Korea, located in Jeju Province (Jeju Special Self-Governing Province). The island covers an area of 1833.2 km2, which is 1.83 percent of the total area of South Korea. In 2020, the resident registration population is about 670,000, the largest among the islands in South Korea.
Jeju Volcanic Island and Lava Tubes
Jeju-do, a Special Self-Governing Province is the only special autonomous province of Korea, situated on and coterminous with the country’s largest island.