Step into a world of vivid color and steamy wonder at Umi Jigoku, one of Beppu’s most iconic hot spring “hells.” Named the “Sea Hell” for its striking cobalt-blue waters, this naturally heated pond is a breathtaking sight created by volcanic activity over 1,200 years ago.

Sagiridai Observatory

Sagiridai Observatory is one of the most popular scenic spots in Yufu, offering a sweeping panoramic view of the Yufuin Basin with the majestic Mt. Yufu rising in the background. Especially breathtaking at sunrise, the area is often covered in a mystical morning mist — called “sagiri” in Japanese — which gives the observatory its name. It's a perfect stop for photos, quiet reflection, or simply taking in the beauty of Yufuin’s natural landscape. Easily accessible by car, it’s a must-see highlight on your journey between Beppu and Yufuin.