Tam Coc literally means three grottos located in Ninh Hai Commune, Hoa Lu District, Ninh Binh Province. Once upon a time this place was full up with flapping sea waves, passing many centuries the waves eroded into the cliffs created different shapes of karst landscapes. The only way to visit Tam Coc by waterway which normally takes about 3 hours. https://hanoiexploretravel.com/things-to-do/ninh-binh/travel-guide-in-tam-coc
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