A dyer stirs dye solution in a six-foot indigo dye pit as part of a traditional indigo dyeing process at the 500 years old Kofar Mata dye pits in the northern Nigerian city of Kano on September 8, 2013. The dye pits established in 1498 has remained alive despite economic downtown that has seen hundreds of factories close shop in the last two decades this commercial city that was once dubbed 'The Manchester of Northern Nigeria' for its factories. The dye pits is one of the city's main historic sites and attracts tourists from around the world. AFP PHOTO / AMINU ABUBAKAR        (Photo credit should read AMINU ABUBAKAR/AFP/Getty Images)