Where in the world is Dongtan, South Korea? (Sung to the tune of Where in the world is Carmen Sandiego?)

So, here is Dongtan on a map in Google Earth. The photo was taken in December before it was built. Notice that I live in a hole according to this picture. Also, I work in a hole.

This is Dongtan with Seoul, so you can get an idea of where I am, relative to the big city.

And finally me in Korea as a whole.