In this January 22, 2015 photo, Chilean tourists Estela Dorion, left, and Renato Valenzuela, wait on the deck of The Aquiles, a Chilean Navy icebreaker, for a zodiac that will transport them to the Bernardo O'Higgins scientific station, Antarctica. The harsh environment requires vacationers to come with many essentials: water-resistant hiking boots, several layers of winter clothes including long underwear and a parka, and powerful sun lotion and dark shades with extra ultraviolet protection. (Photo by Natacha Pisarenko/AP Photo)
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