A short distance from Seoul, Baegundae is a great escape from the city. The national park offers hiking tracks for all levels. Anything from easy to rock scrambling. Baegundae is somewhere in-between. The national park is accessible by public transport and is quite popular. To avoid crowds, it is best to go as early as possible.
A nice day walk up to the summit of South Korea's highest mountain Hallasan located on Jeju Island.
Jangsan Mountain is 634m. A good day trip from Busan. A nice walk with great views over the city and the ocean.