Qatar - Barzan Towers - 01

The Barzan Towers were built by Sheikh Mohammed bin Jassim Al Thani in the late 19th century to serve as watchtowers against the incoming Ottoman soldiers. Although he had defeated the Ottomans a few years before, he still had some unknown reasons to be insecure to build these towers. Aside from being watchtowers, they were also used by the natives, the Qataris, to scrutinize the new moon during the holy month of Ramadan for accuracy, since keeping track of the moon was essential. The towers were restored in 2003 by the Qatari authorities (Ref Wiki)