Foreboding clouds roll across Medicine Lake while it sits in winter hibernation. While the Maligne River pours into the lake from the south, the lake is actually a geological anomaly as there is no visible exit to the lake. The water however drains out through a cave system formed in the slightly soluble limestone rock. It does not surface again for 16km where Maligne Canyon improbably cuts its way out of the ground. The sinking river system is thought to be one of the largest inaccessible cave systems anywhere in the world. Jasper National Park, Alberta, Canada
Mount Assiniboine (3,618m or 11,870ft) reflected over Og Lake. We camped there for the night as part of a multi day hike; a truly spectacular little camp. British Columbia, Canada.
The Perito Moreno Glacier slowly makes its way down to the lower ground of Argentino Lake. At its end the Perito Moreno Glacier has an average thickness of 170m (558ft) with 74m (240ft) visible above the water line of the lake. With over 250 km2 (97 sq mi) of ice the glacier spans 30 km (19 mi) in length and a width of 5km at its terminus. Since 1968 rupturing ice has taken the lives of 32 people who were hit by flying ice. One of 48 glaciers that form part of the Southern Patagonian Ice Field, the high altitude field has a total area of 12,363 km2 (4,773 sq mi) of ice. Los Glaciares National Park, Santa Cruz , Argentinean Patagonia, Argentina.
