These hills are actually royal tombs where the ancient rulers of Korea are buried. These are located right in the middle of the city of Gyeongju where I was staying. As this was taken in winter, the grass was brown, but still makes for a scenic landscape. In total there are 35 royal tombs in this area and plenty of others. In fact, one can see recent burial mounds located throughout the country, on road sides, in woods, and in fields.