Gyeongju was made a national park in 1968, and it is the only one of the twenty-three protected for cultural rather than natural reasons. For nearly a thousand years it was Seorabeol, the capital of Silla — at its height one of the largest cities in the world — and when the kingdom ended in 935 the city simply stopped growing. What was built here was never built over.
The result is a landscape with history lying on the surface of it. Royal tombs stand in the middle of town as grassy hills. The Cheomseongdae observatory, put up in the seventh century, is still standing in a field. UNESCO inscribed Bulguksa and the Seokguram grotto in 1995, and the Gyeongju Historic Areas — five separate zones including Namsan — in 2000.
Namsan is the extraordinary part. The whole mountain, only 468m high, holds well over a hundred temple sites, around eighty stone Buddhas and sixty-odd pagodas, scattered through ordinary woodland along a dozen valleys. Some are national treasures behind railings; many are simply there, weathering, where someone carved them twelve hundred years ago. Koreans call it an open-air museum, and for once that is not marketing.
Give it two days if you can. One is enough for Bulguksa, Seokguram and the tombs; the second is for walking up Namsan, which is what makes the place unlike anywhere else in the country.