Jeju Island is my favorite spot in Korean. Some Koreans say that Jeju Island is the Korean Hawaii.
Jeju Island has many attractions and gorgeous beaches. You can visit a lot of beautiful, scenic spots, museums, and theme parks. You can also golf, hike to the top of Mt. Halla, or walk Olle Trails. There are many kinds of Korean traditional foods such as bibimbap and bulgogi.
I think the best time to visit Jeju Island is from March to April. It is a good time to plan a holiday in Jeju. The weather is warm at this time. You can see many beautiful spring flowers in Jeju.