Torres del Paine National Park, Chile
Why: Mountain glaciers all over the world are melting, and the southern and northern Patagonian ice fields — the largest in the southern hemisphere outside Antarctica — are no exception. A study by Nature Geoscience determined that the glaciers are retreating 450 feet every year in Torres del Paine's Glacier Grey. "The north facing glaciers up in the mountains are going to change dramatically in the coming decades and have already," says Climate Change Institute's Paul Andrew Mayewski, Ph.D., who's been doing research in Patagonia for years. "In the last couple decades, they've been retreating faster than usual because the atmosphere is warming. It's quite serious because they are big sources of fresh water and also for hydropower."
What to do: A once-in-a-lifetime trip calls for Cascada Expediciones' Epic Patagonia Multi-Sport Adventure. The ecocamp is nestled in the spectacular Patagonian wilderness of Torres del Paine, where you'll sleep in geodesic domes, kayak around Glacial Icebergs, pedal 25 miles through the Patagonian plains to Laguna Azul, feast on traditional Patagonian BBQ, gallop on horseback over prairies, and hike to Las Torres Base.
More info: torresdelpaine.com