The Manjanggul Lava Tube is a singular attraction in comparison with what the other factors Jeju island has to offer. Though the lava/rock formations are lovely, it is a hard 1km stroll to the top in the tube. Little ones and elderly people will see troubles walking on uneven grounds https://jeju-island-best-trip-poi66665.blogoxo.com/32485912/the-jeju-tourist-attraction-diaries