Kochbrunnen, Mineral spring in Mitte, Germany
Kochbrunnen produces thermal water at 66.1 degrees Celsius, flowing at a rate of 360 liters per minute from a 43-meter-deep borehole.
First documented in 1366 as Bryeborn, this spring later became known as Syedenborn in 1536 before receiving its current name.
The spring water creates reddish-yellow sinter deposits that Romans used as hair dye, known as Mattiaci balls during ancient times.
The thermal water supplies the Kaiser-Friedrich-Bad processing plant and provides heating for Wiesbaden's city hall through an extensive distribution system.
The spring water appears clear at first but develops a yellow tint after 24 hours of exposure to air, accompanied by a hydrogen sulfide scent.
Location: Mitte
GPS coordinates: 50.08630,8.24190
Latest update: May 19, 2025 06:03
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