On a rainy afternoon in Jeju, one of the best things to do is to visit the Jeju Folk Village Museum. This open-air museum showcases traditional Jeju houses, known as hanok, and offers a glimpse into the island's rich cultural heritage. Explore the various exhibits and learn about the daily life, customs, and traditions of the Jeju people. The museum also hosts cultural performances, allowing visitors to experience traditional music, dance, and crafts. It's a great way to spend a rainy afternoon while immersing yourself in the history and culture of Jeju.