Takkiri Valley is located in the deep mountain between Innai Town and Kusu Town in Oita Pref. The riverbed is composed of a huge monolith with a length of 2 km. The surface of the riverbed is so smooth and the water is so shallow that you can walk in the river and also children can play in the water safely. Clear water, which is selected as one of 15 Fine Water of “Toyo no Kuni (present Oita Pref.),” springs out in the riverbed. Walking along the stream for about 30 minutes, you will get to the point where the Otobi Waterfall drops down into the bottom of the cliff. Takkiri Valley is a part of Koreya-Yabakei Valley, a scenic area surrounded by natural beauty, where towering strange rocks and bizarre stones stand. The combination of those stones and rocks, landscape of a mountain village and autumn leaves altogether attract visitors. As there are fishing pond, picnic shelters, and kiosks along the way, visitors can easily enjoy picnicking or walking. During the summer a camping site is open. You can also admire the tinted autumn foliage of maple trees.