Katanuma Swamp
Katanuma Swamp is the most acidic lake in Japan where is located in Miyagi prefecture, east of Japan. This is a crater lake, which is estimated to have been created approximately 1,100 years ago. It is a nice lake but the smell is a bit sulfurous. The color of the water changes variously by the weather or the position of the sun in the sky.
Color combination and weather is wonderful!