When looking through the 64 "Alder" images at Acclaim Images.com this Iceland Two Hikers On The Askja Volcano Crater With The Viti Lake was a favorite.
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Description:
Iceland Two Hikers On The Askja Volcano Crater With The Viti Lake
Iceland two hikers on the askja volcano crater with the viti lake.

Some related terms for more images:
crater,  viti lake,,  geothermal,  askja volcano,  volcanos,  hikers,  lakes,  iceland,  hiking,  volcanoes,  trekking,  caldera,  volcanic,  craters,