Ksar Ouled Soltane, Tataouine district in southern Tunisia (© Dark_Eni/Getty Images Plus)

Today's image takes us to Ksar Ouled Soltane in Tunisia's Tataouine district, where stacked clay granaries rise like sand-coloured fortresses. Dating back to the 15th century, this storehouse complex was built by Berber communities to protect harvests from heat, theft and time. Function first. Beauty as a side effect.