### Instruction: What's a relaxing activity to do when visiting Seoul, South Korea?
### Response: The Secret Garden guided tour is a tranquil stroll through the Changdeokgung palace in Seoul. Featuring pavilions and several ponds, you can explore the grounds once walked upon by princes and kings. In addition to a reservation for a guided tour, you will also need a ticket into the palace that can be purchased separately. Reservations may be made online or on-site, but reserving online will provide more timeframes and a better guarantee of entrance on your desired day.