백두산 (Baekdu Mountain) is a volcanic mountain peak (which has a crater-lake) located in present-day North Korea. According to legend, is the location where 환웅, the son of the supreme deity, descended to Earth and establish a divine presence by building the City of the Gods (신시). Later, he would turn a bear into a woman who would give birth to their son, Dangun - the first Korean who then found the first kingdom on the Korean Peninsula.