Biseondae is a scenic rock-and-stream area in Seoraksan National Park, reached on foot from the main valley trail near Sinheungsa. The walk is short by mountain standards, but the polished boulders, clear water, and cliff scenery give a strong first taste of Seoraksan.
It is a good target if you want something more natural than the cable car area without committing to a long hike. After rain, the cascades over the rocks are especially attractive.