The Great Friday Mosque, UNESCO World Heritage Site, Chinguetti, medieval trading centre in northern Mauritania, Africa

Sandy square at the UNESCO World Heritage Site of Chinguetti, medieval trading centre in northern Mauritania, Africa

Man walking through the old town at the UNESCO World Heritage Site of Chinguetti, medieval trading centre in northern Mauritania, Africa

Old part of town, street scene, street trading of fruits, Shanghai, China, Asia

Company sign at the headquarters of the steel trading company Kloeckner & Co multi metal distribution in the Silberpalais office building in Duisburg, North Rhine-Westphalia, Germany, Europe

Djemaa el Fnaa market square at dusk, Marrakech, Morocco, Africa

Djemaa el Fnaa market square at dusk, Marrakech, Morocco, Africa

Narrow alley with carpets, carpet dealers, blue houses, medina of Chefchaouen, Chaouen, Tangier-Tétouan, Morocco, Africa

Ordering street food at food truck. Spicy chicken wings with vegetable and herbs

Company sign at the headquarters of the steel trading company Kloeckner & Co multi metal distribution in the Silberpalais office building in Duisburg, North Rhine-Westphalia, Germany, Europe

Old town of Doha, dealer for fragrance essences, Qatar, Qatar, Asia

Mercado Viejo building, the ancient Spanish trading house today serves as a center of local handicrafts, colonial architecture, Masaya, Nicaragua, Central America