大涌谷 is a volcanic valley located in the Hakone area of Kanagawa Prefecture, Japan. It is known for its active geothermal activity, including hot springs and steam vents. Visitors can see the natural beauty of the surrounding mountains and enjoy the unique landscape shaped by volcanic activity. The area is famous for its black eggs, which are hard-boiled in the hot springs and turn black due to the minerals in the water. Eating these eggs is said to add seven years to one's life. 大涌谷 is a popular destination for tourists seeking both relaxation and adventure in nature.