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40 Trips To Change Your World
With its 14-day itinerary to Antarctica, Abercrombie & Kent gives the climate-conscious an opportunity to assist with global-warming research as passengers deliver equipment to scientists at the Palmer Station. Explore the South Shetland Islands along the way, including remote Penguin Island. The only prerequisite: a $500 donation to the Climate Change Challenge, an A&K initiative in partnership with Friends of Conservation.
Trip Tip: Pack your suit for a soak in the thermal waters of Deception Island's Pendulum Cove.
Luxury Level: There are 108 double cabins aboard the 437-foot Explorer II, each with a private bathroom and climate control. (Make sure to request a walk-out balcony.) The vessel also has a 1,000-square-foot health club and spa.
Abercrombie & Kent; 800/554-7016; abercrombiekent.com; $6,190 per person, all-inclusive; December 8-21, 2007.