The best thing about Korea is the food! And if you have a taste for spicy food, try Kimchi Chocolate. It's absolutely delicious! I have only been able to find it at the airport. Most Korean food is 100% natural, containing no sugar but not organic?
The lights that lite Seoul's Tower has recently been modified. If you haven't been. Go! There are two restaurants and a wall with photo's of every tower in the world.
These were shot from a very cool cam/mobile phone. Seoul host's an annual fireworks display during the month of July. Each weekend, you can view a show blasted here in Seoul from counties all over the world. Pretty awesome!