Ondal Cave & Guinsa Temple
27 April, 7:30 am - 6:30 pm KST$45
Ondal Cave is located underground at the foot of Seongsan Mountain, where the Ondalsanseong Fortress is situated. It is a natural limestone cave that is estimated to have begun forming around 450 million years ago.
Guinsa Temple has an impressive, 5-story main sanctuary as well as over 50 chambers and is bordered by modern buildings that can accommodate up to 10,000 visitors.