Tour Guide > Naejangsan (Mountain) > About Autumn Foliage
Naejangsan Mountain is located in southern inland area, and due to its geological characteristics, daily temperature range in Naejangsan Mountain is very huge during fall. When the fall comes, trees block out their pathways to prevent sugar they produced on their leaves from moving to stems. Therefore, sugar made from photosynthesis of leaves continue to build up, and chlorophyll on the leaves are destroyed with the increased acidity. During the process, carotene that have already been in the leaves are exposed and turn into anthocyanin, which turns the leaves red. This process is more active as the daily temperate range becomes greater.
Naejangsan Mountain is located in the middle of wide plains without any high mountains blocking sunlights, and sunshine hours are very long. Long sunshine hours mean less cloudy days and more sunlight for trees. Therefore, as the sunshine hours are longer, trees can photosynthesize more and produce more sugar in their leaves.
No matter how beautiful the autumn colors are, it would look boring if the entire mountain is filled with the same trees of same color and same shape. The reason why the autumn scenery at Naejangsan Mountain is beautiful is because of the variety of trees. In Naejangsan Mountain, there are 11 types of trees that turn colors during fall, which is a very wide variety compared to Seoraksan Mountain (6 types), Jirisan Mountain or Odaesan Mountain (4 types).