Reservation can be booked starting on the 15th
of the previous month. For example, if you want to book for a tour in June, you can start making reservation online from May 15th
(KST). If you try to reserve earlier, all dates will be grayed out and won’t allow you to book your tours.
Also, please make sure you book 3 days in advance for individuals, 5 days in advance for groups.