<p>Cryoconite, a black powdery dust made up of rocks, microbes, and soot, settles at the bottom of Birthday Canyon in the <a href="https://visitgreenland.com/things-to-do/the-ice-sheet/" target="_blank">Greenland Ice Sheet</a>. The ice sheet covers over 80% of <a href="http://www.nationalgeographic.com/travel/destinations/europe/greenland/" target="_blank">Greenland</a> and is accessible to visitors by car, plane, or foot.</p>
Cryoconite, a black powdery dust made up of rocks, microbes, and soot, settles at the bottom of Birthday Canyon in the Greenland Ice Sheet. The ice sheet covers over 80% of Greenland and is accessible to visitors by car, plane, or foot.
Canyons and Valleys: Striking Landscapes Across the World
See photographs of some of Earth's most awe-inspiring destinations.
Canyons and valleys provide vast landscapes for adventurous travelers to explore. Climbers tackle routes up their rocky cliffs. Paddlers float down their flowing rivers. Hikers traverse their blossoming meadows and desert trails. Whether you prefer the view from Earth's highest peak or deepest crevices, find the inspiration for your next trek in this photo gallery of steep and sloping scenery around the globe.
- Nat Geo Expeditions
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