To summarize, this trip was absolutely worthwhile. Our tour guide, Ms. Li Jing, was incredibly reliable, patient, and humorous. I tend to get motion sickness, and listening to her talk was a great distraction. The Frog Temple was very interesting. Two and a half hours in Yufuin wasn't enough time to explore everything. As for the Sea Hell, I initially thought it would be boring, and the online pictures didn't look impressive. But when I arrived, I discovered it was a paradise, like an Emerald City with magnificent natural hot springs. The rainy weather added a unique charm. Finally, a big thank you to our driver for his hard work.