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Curtain rocks Halla Mountain Jeju.JPG - Ryuch
Manjanggul Lava tube.jpg - TKostolany
Sangumburi volcanic crater.jpg - Naturehead
Columnar jointed basalt in Daegyocheon, a branch of Hantan River, at Cheolwon, Gangwon-do, South Korea, image 3.jpg - Jjw
Columnar jointed basalt in Daegyocheon, a branch of Hantan River, at Cheolwon, Gangwon-do, South Korea, image 1.jpg - Jjw
Columnar jointed basalt in Daegyocheon, a branch of Hantan River, at Cheolwon, Gangwon-do, South Korea, image 2.jpg - Jjw
Columnar jointed basalt in Daegyocheon, a branch of Hantan River, at Cheolwon, Gangwon-do, South Korea, image 5.jpg - Jjw
Columnar jointed basalt in Daegyocheon, a branch of Hantan River, at Cheolwon, Gangwon-do, South Korea, image 4.jpg - Jjw
Columnar jointed basalt in Daegyocheon, a branch of Hantan River, at Cheolwon, Gangwon-do, South Korea, image 6.jpg - Jjw
Mount Hallasan.jpg - Ecukuroglu
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