Paddling through paddy fields

We’re peering down the winding Ngo Dong River at a group of boats meandering through rice paddy fields. This is the Ninh Binh province in Vietnam, about 60 miles south of Hanoi. On these two-hour tours by traditional Vietnamese rowing boat, visitors wend their way between limestone karst peaks, through grottoes, and past workers harvesting rice in the fields, their wide-brimmed hats shielding them from the sun.
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