Start the visit by walking down the Yunotsubo Street, the commercial and cultural center of the city. You can try local specialities, go to themed coffee shops and buy local craftsmen goods. The buildings are picturesque and the street offers a great view of Mt Yufu.
There are many hikes starting from Yufuin, and if you have enough time, I would recommend to hike to Mt Yufu summit (1584m), the symbol of the area. The hike takes few hours (5-6h) on a mountain path. Unfortunately, we didn’t had time to do it but I would have love to see the view from up there in the sky !
After a long hike, you can finish the day with a moment of relaxation by going to one of the numerous onsens (Tsuka no Ma, Baien, Musoen…) that are located in the area, or spend the night in a traditionnal ryokan.