If you ever come to South Korea, I suggest you to go to Seoul Sky of Lotte Tower, and make sure to visit early because it is popular destination. So far I have visited at both day and night, and I liked the both. During the day time, you can see the beauty of the modern city, and at night, it is just so beautiful to see all the flickering and shining lights.
Photo by me
Some sections have directions to let you know where you are looking at the current moment.
Seoul Sky is considered the world`s fifth tallest building, and 555 meter high above ground. From the top, you can see the Lotte World, and I am standing at the Sky Deck section which is floor 118th, and considered 478 meter high.
There are airport shuttle, blue, red and green bus that goes to Lotte World, and you can also take subway
(Jamsil station exit1,2, and 10-11).
If I remember correct, this part was called Media Stand where you can observe the city via touchscreen.