Soyangho Lake is a man-made lake that was created when Soyang Dam, the biggest rock-filled dam in Asia, was built in 1973. The lake is a hotspot for aquatic tourism and the lakeside road is an important route that connects Chuncheon and Yanggu. Driving from Chuncheon to the dam will take about one hour, but the Kwaeryongho Boat, a hovercraft that operates regularly on Soyangho Lake, only takes about 30 minutes. The hovercraft travels by ejecting air against the surface below, sending up a spray of water on either side of the boat to the delight of passengers. In the valley, visitors can see fish farms floating among the islets. When the water level is high, it is possible to travel on the lake all the way to Inje and Sinnam, enjoying the beautiful scenery of Seoraksan Mountain. Both tourists and locals regularly make use of the ferry service.