Morocco is famous for producing high quality soft leather. It is recommended that only those with strong stomachs visit the tanner's quarter, close to the Karaouine Mosque, which despite its odorous reputation has become one of Fez's main attractions. You can hire a guide to take you into the leather-dying pits, but will not be allowed to see them unaccompanied. Alternatively, visitors can ascend to any one of the terraces belonging to the surrounding leather shops that look down on the fascinating tanners' yard, honeycombed with vats of dye and piled with skins (it is expected that you will at least look around the shop afterwards, and if nothing is bought a tip to the shop owner is required). The reason for the bad smell is chiefly because guano and pigeon droppings are used as part of the curing process.
Address: Bab Debbagh (Tannery Gate)
Opening times: Daily 9am to 6pm