Adventure Associates Specializing in Antarctica and Arctic cruise expeditions, and tours throughout Latin America. http://www.adventureassociates.com/

Adventure Network International Offering several Antarctica tour packages. Also offers Arctic and millennium tours. http://www.adventure-network.com/

All Patagonia Offers adventure and nature tours in Patagonia, Antarctica, Torres del Paine, and more. http://www.allpatagonia.com/

Aurora Expeditions Features adventure travel cruises to Antarctica, High Arctic, Galapagos Islands, Amazon River, Kamchatka, and Australia's Kimberley Coast. Options include sea kayaking, scuba diving, and potential interaction with polar bears, penguins, and whales. http://www.auroraexpeditions.com/

International Nature & Cultural Adventures (INCA) Small group adventures in the Galapagos Islands, Peru, Turkey, and Antarctica. http://www.incafloats.com/

Snowsled Journeys Offers guided mountain climbs and journeys to polar lands. Also manufactures specialist rescue equipment and polar expedition equipment. http://www.snowsled.com/

The Polar Travel Company, The - Polar Travel Company Offers specialist guide and expedition services to both the Arctic and Antarctica. Features polar cruises, circumnavigations, expeditions to either pole on foot or dog sled, and more. http://www.polartravel.co.uk/

TravelWild Expeditions Features expert-led wildlife, cultural, and natural history tours to remote destinations such as the High Arctic, Antarctica, Alaska, Iceland, Brazil, and Churchill, Manitoba. http://www.travelwild.com/