If you happened to visit Chonan, don't forget to try the walnut snacks. They are kinds of bread with walnut and red beans inside. Even when you just go to another City, you should drop by at the resting area and have some walnut snacks. You can buy at least 3,000won (around $3).
Here are the walnut snacks that my hubby received from his friend. They are good presents for someone specially during holiday seasons, many people buy boxes of this snacks to give as a present.
I've already received boxes of this snacks many times. Mostly, they are from hubby's friends, relatives or from parents of my students.