Symmetrical water gardens at the base of Sigiriya fortress, with rectangular pools and fountains along the western approach.
The symmetrical water gardens at the base of the rock are fed by a gravity-operated hydraulic system that still functions during the monsoon — fifteen centuries later, some of these fountains still run. Kashyapa built this before he built anything else. The message was clear. © Michael Gunther, CC BY-SA 4.0, via Wikimedia Commons

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