I have been to DDP three times. The first time was for sightseeing and art exhibitions. The next two visits were fashion week. I remember the first time I went there was in the evening. The weather was fine so the moon was clear and bright. The lights make the silver buildings more vivid. I had a great time taking pictures and walking with my friends. It is located in the city center with convenient transportation and excellent geographical location. 

DDP was designed by Zaha Hadid and Samoo, the overlooking is a large curved building, a bit like a spaceship or ufo. If you are traveling to Seoul, a half-hour walk around DDP is also a good choice.