Don’t tell people you visit Korea w/o visiting its palaces. There are admission fees but you can just walk in without paying because there’s simply too much people for the ushers to manage. Just stick behind a tour group and listen to the guide to know more about the palace.
Day 4: The Secret Garden & InsadongChangdeokgung Palace was the 2nd most important palace in Joseon times, and according to the palace brochure, loved more than any of the other palaces because of its huge garden in the palace grounds. Well, after visiting, I can see why. This garden, known as the Secret Garden (or, Huwon) takes up 2/3 of the entire palace, and was used by the royal family for relaxation, hunting, other outdoor activities and creative pursuits like poetry writing. I would totally chill in this palace. The garden is spacious, beautiful, and peaceful. The trees kind of shade you from what's outside. The secret garden is named as such not because it's a secret, but it refers more to it being "private", since only the royal family and their personal servants were allowed inside. The pictures below are all parts of the secret garden.