Southern Argentina’s Los Glaciares National Park stretches parallel to the Andes for over 120 miles, its most famous members being the Perito Moreno, Upsala and Onelli.

The Perito Moreno Glacier is one of the natural wonders of the world, and its dimensions are truly breathtaking; measuring over 3 miles wide and approaching 19 miles in length.

One of the only worldwide glaciers to be advancing rather than retreating, it is nonetheless a poignant symbol of global warming; conservationists keep a close eye on its dimensions and its progress as it periodically calves huge chunks into the Lago Argentino. Witnessing - and hearing - such thunderous creaks and falls is utterly awe-inspiring, whether from a boat in the vicinity, or from the terrace of a nearby hotel.

A mini-trekking expedition can also be organised on the glacier itself, reached by special rubber boats. Crampons are required and will be supplied; you will be on the ice for about 90 minutes and in that time will see crevasses and small vivid blue inner lagoons.

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Ollie and Kate B are our 'Glacier Ice Trekking' experts and as seasoned travellers they have the inside track on the most memorable adventures.