Wikipedia
Bukhansan, or Bukhan Mountain, is a mountain on the northern periphery of Seoul, South Korea. There are three major peaks, Baegundae , Insubong , Mangyeongdae . Because of its height and the fact that it borders a considerable portion of the city, Bukhansan is a major landmark visible from most city districts. The name "Bukhansan" means "mountain north of Han River", referring to the fact that it is the northern border of the city. During the Joseon era, the peaks marked the extreme northern boundary of Seoul.
Bukhansan is the highest mountain within Seoul city boundaries. Apart from Bukhansan, there are seven other mountains including Dobongsan and Suraksan that are over 600 meters high within the city.
Popular throughout the year, Bukhansan, and Bukhansan National Park, which was formed in 1983, are renowned for birdwatching, hiking and rockclimbing. Bukhansan attracts a large number of hikers; around 5 million per year.