With its 500 narrow houses bunched close together, built like a fortress in the midst of Wadi Hadramaut, Shibam is architecturally unique. Its six-storey houses, built of mud with stone foundations, look like skyscrapers. The nickname “Manhattan of the desert” is an apt one. Twice destroyed in the 13th and 16th centuries, Shibam has scarcely altered since it was last rebuilt after 1553.