View of columnar joints on Jeju Island

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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, in the city of Seogwipo on South Korea's largest island of Jeju on Oct. 8, 2026. (Yonhap) (END)

Tourists look at columnar joints, or natural pillars of hardened lava created by the contraction of volcanic rock as it cools, in the city of Seogwipo on South Korea's largest island of Jeju on Oct. 8, 2026. (Yonhap) (END)

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济州岛柱状节理景观 2026年10月8日，在韩国最大岛屿济州岛西归浦市，游客们正在观赏柱状节理，即火山岩冷却收缩形成的天然硬化熔岩柱。（韩联社）（完）

2026年10月8日，在韩国最大岛屿济州岛西归浦市，游客们正在观赏柱状节理，即火山岩冷却收缩形成的天然硬化熔岩柱。（韩联社）（完）