Walled City of Shibam, Yemen.

  This rectangular walled city dates to back the 16th Century, one of the oldest and most impressive examples of vertical urban planning. Found on the crossroads of Africa, Asia, and Europe, this town with sun-dried mud brick tower houses, some reaching eight storeys high, has its history entwined with travelling caravans seeking frankincense and … More Walled City of Shibam, Yemen.