Gunnar Caya
Google
Scenic, and at times, stunning place. The mountains aren't that tall or challenging as far as hikes go, and the trails leading to the mountains aren't that noteworthy, but boy are they beautiful. The autumn foliage here is phenomenal, one of the best spots in Korea to see the changing leaves.
Of course, that means massive crowds, especially on weekends. If you can swing time off from work, do try and come here on a weekday so you won't be here with throngs of people. Or you could just come here outside of the 3 week foliage window, but you would be missing out on some of the best fall foliage there is