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Every autumn, Noboribetsu's red leaves attract a large number of tourists. Hell Valley is the remains of a volcanic crater in Noboribetsu City that is still spewing white smoke. The scarlet earth is surrounded by fiery red maple leaves, which complement each other perfectly. In October, you have the opportunity to enjoy this fairyland-like scenery. Noboribetsu Onsen is also a unique place to view red leaves. The hot springs are paired with red leaves, allowing travelers to relax physically and mentally. The Oyunuma Observation Deck on the south side offers a panoramic view of the autumn leaves of Oyunuma. The red leaves on the lakeside contrast with the steamy lake surface, creating a unique autumn scenery. Visitors can also stroll along the trails and enjoy the beautiful red leaves of Noboribetsu up close.