Ingwansan is a 338 metres tall mountain located in the heart of Seoul. A short walk away from the nearest subway station, a brief 15 minute hike will see you encountering Buddhist temples, citywide vistas and a shamanist shrine to boot.
Be sure to pick up some kimbap (김밥 in Korean script) from one of the many small restaurants nearby to devour as a snack upon reaching the summit. Made of white rice and various other ingredients, wrapped together in dried laver seaweed, a kimbap is the perfect reward after a short and sharp climb.
Oh, and don't be surprised if you're offered a soju pick-me-up by one of Korea's numerous elderly hikers!
From Dongnimmum Subway station (Line 3), leave through Exit 2 and take an immediate left. Follow the winding road and you will, after 2-3 minutes walking, come across some steps on the right handside. Climb the steps and you'll find yourself at Ingwansan.
Google map: bit.ly/ziF6hT