View of columnar joints on Jeju Island

남상현 / 2025-05-02 16:25:23
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View of columnar joints on Jeju Island

Tourists look at columnar joints, or natural pillars of hardened lava created by the contraction of volcanic rock as it cools, aboard a boat in waters off the city of Seogwipo on South Korea's largest island of Jeju on May 2, 2025. (Yonhap)

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