I went to this buffet today and it was amazing. I think this is the best buffet in Seoul but it is a little difficult to get to without a car. Maybe a $3-4 taxi ride from a subway station. It is not in Seoul, it's right on the edge. I couldn't get good pictures of the food since i came late and so i found some pictures off of the internet.
They were growing a bunch of vegetables right in front of the parking lot.
They even invited me to hike up and see their blueberry plants and apricot trees. Wow I got offered some free blueberries and apricots. Amazing