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:max_bytes(150000):strip_icc()/lava-beds-national-monument-california-lava-tube-cave-LAVABEDSCA0622-01d3a007224d4c13ae55285b75107ba2.jpg "This California Monument Has the Highest Concentration of Lava Tubes in North America — With More Than 800 Caves")
This California Monument Has the Highest Concentration of Lava Tubes in North America — With More Than 800 Caves
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![Destinations by Region : VisitKorea Destinations by Region Manjanggul Lava Tube [National Geopark] (만장굴 (제주도 국가지질공원)) | Official Korea Tourism Organization](https://tongglobalcdn.visitkorea.or.kr/cms/resource/17/2944117_image2_1.bmp "Destinations by Region : VisitKorea Destinations by Region Manjanggul Lava Tube [National Geopark] (만장굴 (제주도 국가지질공원)) | Official Korea Tourism Organization")