Its houses were furnished with brick-built bathrooms, many had lavatories. Waste water from these led into well-constructed sewers that ran along the centre of the streets, covered with bricks. Among the many artefacts unearthed here, and one which stays in my mind, is a tiny, 10cm-high The structures of brick roads can identify and place. It said that lived about 35,000 people of all you can see is crumbling. Red walls are falling apart from the base up. That's because the salinity in ground water which bubbles before they discovered, had lived for thousands of years.