The loveliest Joseon palace, and its Secret Garden. Book the garden tour.
Changdeokgung is the most beautiful and best-preserved of Seoul's grand palaces, a UNESCO site whose buildings bend to the hillside rather than flatten it, hiding the famous Secret Garden behind. It's the connoisseur's palace to Gyeongbokgung's grandeur.
Yes, arguably prettier than Gyeongbokgung; just pre-book the Secret Garden tour.
There's a small entry fee, no need to book far ahead.
Arrive at opening, and here's the key move: the Secret Garden (Huwon) is only accessible on a timed guided tour that caps numbers and sells out, so book it online ahead, because it's the whole reason to come.