If you think Changdeokgung Palace looks suspiciously like Gyeongbokgung Palace, you’re not far wrong. Changdeokgung was basically built as a replica of Gyeongbokgung when the latter’s location was deemed to be insufficiently auspicious. Changdeokgung, however, has an expansive “secret garden” around the back that was resplendent in fall foliage.
Gyeongbokgung Palace, the largest of Seoul’s palaces. While pretty much entirely reconstructed (the Japanese occupation of Korea didn’t of any favours to the longevity of major buildings), the scale of the place is pretty stunning.