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| Cat Ba is the largest island among 1,969 islands on Lan Ha Bay. (Photo: Vietnamplus) |
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| An aerial view of Lan Ha Bay. (Photo: Vietnamplus) |
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| Located adjacent to Ha Long Bay, Lan Ha Bay encompasses Cat Ba archipelago. This is a calm, arc-shaped bay with about 400 large and small islets. (Photo: Vietnamplus) |
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| A cruise ship visits Lan Ha Bay. (Photo: Vietnamplus) |
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| Kayaking on Lan Ha Bay is an interesting activity for sports lovers. (Photo: Vietnamplus) |
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| Tourists go kayaking to explore Lan Ha Bay. (Photo: Vietnamplus) |
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| Small islands still retain untouched and pristine beauty. (Photo: Vietnamplus) |
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| Visitors cycle under forest canopies to explore an ancient village of Viet Hai, in Cat Hai island district. (Photo: Vietnamplus) |
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| Cat Ba archipelago consists of 367 islands, including Cat Ba island in the south of Ha Long Bay. Cat Ba archipelago was officially recognised by UNESCO as a world biosphere reserve on December 19, 2004. (Photo: Mai Mai/Vietnamplus) |
What the stars mean:
★ Poor ★ ★ Promising ★★★ Good ★★★★ Very good ★★★★★ Exceptional