UNESCO calls it ‘A remarkable example of viability and transmission of human being’s collective thoughts from different generations to the present one’. I am talking about the historical desert city of Maybod in the Yazd province of Iran. This ancient city that goes back to the pre-Islamic era is part of the UNESCO World Heritage site tentative list. It is known for its traditional architecture that can be seen through its ancient roads, old castles and other remnants of the historical city. Maybod was once the capital of Iran during the Mozaffarid period and is home to Narin castle, one of the oldest castles in Iran dating back to the Sassanid era. This mud-brick fort castle standing 130 feet high from its base incorporates mud bricks of the Medes, Archaemenid and Sassanid periods. Although built some 6000 years ago, it seems to have some kind of a plumbing system built into its massive walls. One can see more examples of such water works through other buildings housing underground wa...