설악산 비선대와 천불동계곡 일원, Natural heritage site in Seoraksan National Park, South Korea

Biseondae Rock and Cheonbuldong Valley form a mountainous landscape with steep cliff faces, cascading waterfalls, and granite rock formations of varying shapes. The area spans a large terrain and connects natural outcrops with caves and deep valley gorges.

Biseondae and the Cheonbuldong Valley area was designated as Korean Scenic Site No. 101 on 11 March 2013. The valley's scenery was already praised in Joseon-era travel diaries such as Kim Chang-heup's "Seorak Ilgi" and Kim Mong-hwa's "Yuseorak-rok". The rock inscription "Biseondae" is recorded in the Yangyang Eupji as the work of Yun Sun.

Biseondae takes its name from the immortal Magoseon, who is said to have ascended to heaven from this rock. The characters "飛仙臺" carved on the stone are recorded in the Yangyang Eupji as the work of Yun Sun. The valley name Cheonbuldong comes from Cheonbulpokpo Falls, evoking a world of a thousand peaks and clear pools.

The area offers multiple hiking trails through the valleys, leading to various viewpoints and natural rock formations. Visitors should be prepared for changing elevations and wet conditions near the waterfalls and streams.

Geumgang Cave within the valley was a known location for Buddhist meditation practices in earlier times. This cave demonstrates how the natural landscape attracted people seeking spiritual discipline and contemplation.