Why is this hot springs blood red?  The pond is blood red because of the high iron oxide, hematite content in the sediment deposited at the bottom of the pool.  Interestingly the word hematite is derived from the Greek word for blood.  In this case, the red color of the iron fills the water and makes it change color, and when you combine this with boiling, 200 °C.
Read more about Onsen


4 Responses to “Beppu Onsen-Beppu Hell”

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