Changdeokgung, also known as Changdeokgung Palace, is set within a large park in Jongno-gu, Seoul, South Korea. It is one of the “Five Grand Palaces” built by the kings of the Joseon Dynasty. The garden is open to the public and offers some lovely running over nearly 80 acres of trails. Since the garden is a major tourist attraction, it is best avoided during the peak hours. Note: fee required.
One can put together a good 5 km on the garden trails and palace grounds.