Owakudani is a volcanic area in Hakone known for its sulfurous fumes, hot springs, and scenic views of Mount Fuji on clear days. Visitors can take a short walk to see steam vents and bubbling pools, or embark on a more adventurous hike to Mount Kamiyama and beyond (currently closed due to volcanic activity). Don't miss the famous blackened eggs cooked in the hot spring pools - they say eating one adds seven years to your life!