Through green tours visitors can observe, understand, and enjoy mother Nature. The most popular and famous tours are to the first "Slow Cities" in Asia, a cultural trend known as the slow movement. Slow cities include Jeungdo, Cheongsando island, and Damyang.
Also of significance is the Olle Trails and the Jejudo Island and Jeju Volcanic Island and Lava Tubes, which are UNESCO's World Heritage sites.
Jejudo Ollie Trails: The Ollie Trails are a collective pathway of 22 routes on Jejudo Island. Depending on the pace of the individual or group, each route takes four to six hours.
Walking along the coast is the best way to experience the unique and startling beauty of Jejudo Island.
Futher information can be found: Korea tourism Organization