Crystal Cave of Svmnafellsjvkull in Skaftafell national park, Iceland公仔箱論壇! I5 S. X+ K' j
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Nature at its best: Created by the awesome forces of the Vatnajvkull ice cap in the south of the volcanic island, the deep blue cave was formed by the glacier meeting the coastline( O/ q& A- ]7 M: A
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Changing size: Accessible through a 22-foot entrance on the shoreline, the cave tapers to a tight squeeze at the end no more than four feet high |