This is a lovely hike for those that don't want to venture too far from the city. It is easily accessible from Haeundae beach, as it's the mountain towering around it. The hike itself is about 7 or 8 miles, and can be quite strenuous at times. Make sure to bring some water with you, and 1000 won if you fancy an ice lolly at the top of the mountain where there is a kind man that sells them during the summer. There are may beautiful flowers along the way, and the view from the top is just breathtaking. Make sure to hike Jangsan on a clear day, and you'll have a stunning view of the city from the top. Some say you can even see Tsushima Island, (Japan) on a super clear day, but I'm still looking out for it!