Employees of a disposal company use buckets to remove red mud from the fountain at Sprudelhof (‘fountain court’) in Bad Nauheim, north of Frankfurt, Apr. 6. About ten cubic metres ( 353,147 ft3) of the substance that accumulates over the course of a year due to the mineral-rich water has to be removed and disposed of every spring. Sprudelhof was built as a central spa complex in Jugendstil (art nouveau) style between 1905 and 1911.