Silver grasses at Ecoland was beautiful and made me to shoot a lot of photos. Silver grasses in Sangumburi was awesome and I felt like lying down and look at the sky. These are all come with a bit of entrance fees.
Silver grasses at Saebyeol Oreum (volcanic cone) comes free of charge and yet the most breathtaking. From the entrance, take the left hand side path which is quite stiff. You might want to give up every 10 steps if you are not fit enough. Then you look down the scenery and that gives you more energy to climb up. Once you are at the top the wind will almost blow you off. Coming down from the other end is a lot easier but I still suggest you to experience both paths.
Just like other hidden(?) places, this is well known to Koreans but not to foreign tourists. You can only reach there by cars or taxis. It is about 25 min driving from Yongmeori Coast(Dragon Head Coast) or 30 min driving from Hyeopjae beach.