新西兰怀托摩洞穴：萤火虫点亮地下星空
Deep under green hills on New Zealand’s North Island, there is a secret world. It is a cave full of small, soft lights. The place is called Waitomo.
Near the cave, a river flows silently. Visitors sit in a small boat. The boat moves very slowly in the dark. People lift their heads and see the cave roof. It shines with many blue-green points of light.
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