For a unit study on Korea, go here. Better yet, join Knowledge Quest and get a newsletter sent to you with interesting stuff in it. 🙂
For more on Korea you could check out the following:
Wikipedia.
You could go to google earth and explore it via satellite.
You could check out South Korea’s tourism site.
Or you could see what the CIA has on South Korea and North Korea.
I learned that just doing a search on Korea will draw up more resources for south korea than for north. I found that interesting and am not sure why that it is. Perhaps later today I will have a chance to discover the reasoning behind that.
There are a lot more resources on-line, just go check them out. 🙂