Namsan Cable Car.
In the heart of Seoul is Namsan Park, at 262m high, with fab city views. The park itself is bland, but the twilight and night views are what you come for. Zap up on the old-school cable car, and then ascend to the observatory of N Seoul Tower. There is a bevy of cafes and shops, plus a cute wishing pond to enjoy. Namsan Park / Cable Car runs 10am-11pm daily / 남산케이블카 / cablecar.co.kr / N Seoul Tower / N서울타워 / nseoultower.com