Jeju is South Korea's largest island. It's located in Seoul, the capital and largest metropolis of South Korea. The population is over 10 million residents. The Seoul Capital Area, which includes the surrounding Incheon, and Gyeonggi provinces has a population of over 25.6 million people.
Seoul is considered a technology hub. Fortune Global 500 multinational companies, Samsung, LG, and Hyundai-Kia have roots in Seoul.
Tourist attractions around Jeju Island:
Hallim Park, is one of the oldest and most popular tourist attractions on Jeju. It is located on the west coast of the island.
The Jeju Olle Trail, is a long distance footpath on Jeju Island. The course, mostly following the coastline, consists of 21 connected, numbered main courses, 5 major spurs, and a short spur that connects to Jeju Airport.
Manjanggul, is one of the longest lava tubes in the world, and is considered a Natural Monument
Sangumburi Crater, is the crater of an extinct volcano. Sangumburi is the only one of its kind in the country, making it a Natural Monument.
Mt. Halla, Mount Halla is a dormant volcano. It stands at the center of Jeju Island.