The National Geographic Explorer is part of a co-brand called National Geographic-Lindblad Expeditions. The two companies have been partners in expedition cruising for more than 20 years.

Travelers have a chance to win a free cruise to Antarctica with National Geographic. You must be 18 years or older to enter, and can submit an entry once per day starting April 15.

National Geographic-Lindblad Expeditions has been taking travelers to Antarctica since 1966, giving the tour company almost six decades of experience on the White Continent.

WASHINGTON, D.C. -- Ahead of Earth Day, National Geographic announced the ourHOME sweepstakes, part of the brand's Earth Month celebration. Open to anyone in the U.S over 18 years old, one lucky ...

To learn more about National Geographic-Lindblad Expeditions' Antarctica experience, unique itineraries, and Lindblad Expeditions' pioneering heritage in the region, visit www.expeditions.com ...