Owakudani is a volcanic area in Hakone, near Tokyo.
It is part of a crater formed by the last eruption of Mt. Hakone over 3000 years ago.
It offers nice views of Mt. Fuji on clear days.
The mountain is covered in natural hot-springs and the strong stench of sulfur.
You can buy eggs cooked in the hot-spring water.
The sulfur in the water turns the eggs black.
If you eat one it’s said to prolong your life for 7 years.