Another world greets you just a short 30-minute drive from the Icelandic capital Reykjavik. Raufarhólshellir Lava Tunnel is a terrific example of a lava cave created following a volcanic eruption ...
A photo of a cave where the side walls are ribbed and lit in a butterfly pattern. Credit: Craig Bettenhausen/C&EN C&EN reporter Craig Bettenhausen was in Iceland in early October en route from the ...
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