AMMAN — The infrastructure of Petra, the capital of the ancient Nabateans, still remains a mystery to most people who visit this heritage site. The focus of tourists when they arrive to Petra is to find splendid monuments, temples, shrines, churches and market places, but the water infrastructure and the way Nabateans preserved water for irrigation and drinking is relatively unknown, noted Ulrich Bellwald, a Swiss archaeologist, conservator and architect.
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