Wikipedia
Toham Mountain, or Toham-san, is a mountain with a height of 745m in Gyeongju City in southeastern South Korea. It is part of the minor Dongdae Mountains range. The mountain lies within Gyeongju National Park and is the site of a large number of historic relics. The Silla-era Buddhist shrines of Bulguksa and Seokguram are located on its slopes. The mountain stands at the intersection of three subdivisions of Gyeongju: Bulguk-dong, Bodeok-dong, and Yangbuk-myeon. The Sea of Japan (East Sea) can be seen from the peak, as can Gyeongju Basin which includes the city center.
During the Silla period, Toham mountain was referred to as Dongak (東嶽) literally meaning "East Big Mountain" and considered a guardian mountain of the country, so that major rituals were held.