The concentration of remains is particularly high at the foothills west of Namsan. The remains are thought to reflect the rise and fall of the Silla kingdom. Najeong Well is the mystic birthplace of King Park Hyeokgeose, founder of the Silla dynasty. Only a small stone with inscriptions remains of this site. According to legend, one day in 69 BC Seobeol—chieftain of Goheo village—spotted a white horse kneeling by Najeong well. When approaching the site to take a closer look, the horse disappeared, but he found an egg. From the egg hatched a boy who was chosen to become king at the age of 13.