General admission ticket does not include the Huwon secret rear garden.
Changdeokgung, and the rear garden, is included with the Integrated Ticket Of Palaces.
Changdeokgung Palace is a grand royal residence located east of Gyeongbokgung Palace, in Jongno-gu. Changdeokgung is the best preserved of the remaining Joseon palaces in Seoul.
Construction began in 1405 during the reign of King Taejong. and was completed in 1412. Gyeongbokgung was located in the west. Changdeokgung, along with Changgyeonggung Palace, were located in the east and therefore they were known as the “East Palace”.