Large ducts, carved out of stone, sloped toward the sea and carried wastewater to deep soak pits that were placed far away from sources of fresh water.
यह सफाई व्यवस्था इतनी आधुनिक थी कि उस समय के ज़्यादातर यूरोपीय देशों में भी ऐसा देखने को नहीं मिलता था ।