Jangsu is a region where mountains and clear waters blend harmoniously. As it is home to the headwaters of the Geumgang and Seomjingang Rivers, it offers tranquil relaxation amidst unspoiled nature. Containing pristine valleys, ecological parks, and unique experiential spaces, it provides visitors with an unparalleled resort destination with its diverse charms.

Hiking up the Shinmusan Valley in Subun-ri, Jangsu-eup leads to Tteungbong Spring, the source of the Geumgang River. This is a place steeped in the legend of King Taejo Yi Seong-gye, with a tale passed down that he received a revelation from a soaring phoenix to establish a new nation. Dangjae, located below the spring, serves as the watershed divide between the Geumgang and Seomjingang Rivers, allowing visitors to experience the mystique of nature at the starting point of these waterways.

Jiji Valley, situated in Jiji-ri, Bonam-myeon, is the uppermost reach of the Seomjingang River, where pristine water originating from Jangansan and Baegunsan Mountains flows. Dense forests thrive along the 10-kilometer-long valley, and the crystal-clear water meanders through it, creating distinct landscapes in every season. In particular, the entire valley is tinted red in the autumn, forming a magnificent spectacle.

Deoksang Valley, originating from Jangansan County Park in Dusan-ri, Jangsu-eup, is characterized by its dense primeval forest and deep ravines. Starting from Beobnyeondong and flowing into Jangsu, this valley features a harmonious blend of approximately 10 large and small pools called 'Yongso' (ponds), along with over 20 strange rocks and bizarre stones such as Yongbawi and Seonseonbawi. Splendid scenery unfolds among the clear streams, and it is particularly renowned for its beautiful autumn foliage.

Toogokdong Valley, located in Gyebugok-myeon, is a majestic and picturesque ravine nestled between Bukdeogyusan and Namdeogyusan Mountains. It is a scenic spot of high value, historically significant and also recognized as a site for the collection and research of alpine plants. Visitors can enjoy the experience of savoring raw trout raised in the clear valley waters while taking in the surrounding landscapes. Additionally, nearby historical relics include Yangaktap and the battle monument of civilian militia leader Mun Tae-seo.