Wikipedia
Shilleuksa (also written as Silleuksa and Shilleuk-sa) is a Korean Buddhist temple situated against a low hill on the north side of the river Namhan, three kilometers east of Yeoju in Gyeonggi Province, approximately one-hour southeast of Seoul. The only riverside temple in Korea, Shilleuksa is a sacred pilgrimage site and a repository of seven Treasures. A 500-year-old aromatic juniper tree and a 600-year-old ginkgo tree stand on the temple grounds.
Founded in circa 580 by Silla Dynasty monk Wonhyo, Shilleuksa was enlarged, burned, and rededicated several times. Shilleuksa was made a prayer sanctuary to the royal mausoleum of King Sejong the Great in 1469 (himself moved from Seoul that year), during the reign of King Seongjong. Often referred to as the "wall temple" because of an impressive brick pagoda towering high above, Shilleuksa is small by standard measure.