| Pont du Gard, built during Old Roman Era in about 19th century B.C., is
the aqueduct on the way to transport 20,000 cubic meters of water a day
at a distance of 50 km from Yuzes, water source, to Nimes in the west.
It was worth seeing.
It was a three-story stone arch bridge, as you see, 49m high and 275m long.
How was it culculated for the slope in order to lead water for a long way
of 50 km?
This bridge is only 0.55% of the whole waterway all right, but I could
never judge it had any slope while viewing so carefully.
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