Church at Vik
Vík, the southernmost village in Iceland, lies directly beneath the Mýrdalsjökull glacier, which lies on top of Katla volcano. Katla has not erupted since 1918. Its present dormancy, one of the longest in its history, has led to speculation that an eruption may occur soon. An eruption could melt enough ice to trigger an enormous flash flood, some say large enough to obliterate the entire town. The town's church, located high on a hill, is believed to be the only building that would survive such a flood. Here's hoping the worst doesn't happen!