It takes seven or eight hours and strong legs to hike the whole crossing, past ice-blue crater lakes, over snow-covered ridges and through windswept mountain deserts, where totara trees cling to the soft black volcanic sand.

BBC: A return to Middle-earth

For sheer remoteness and scenery, visit South Georgia, a narrow, 106-mile-long, snow-covered, glacier-strewn, unpopulated island with two majestic mountain ranges.

ECONOMIST: Icebergs ahoy | The

Waterfalls and fjords carve dramatic shapes along the shore, the Chugach mountain range studding the horizon with snow-covered peaks.

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