Guests from the Lindblad Expedition ship National Geographic Explorer taking the "polar plunge" inside the caldera at Deception Island in Antarctica

animal group animal animalia animals antarctic adults adult adventure adventurers adventures adventurous antarctic peninsula antarctica antarctis boats boat cold cold temperature cold temperatures color images color color image colour images colour image colour circumpolar day days explorer expedition exploration explorers exploring flen front view front frontal full length grown up grown ups grown up grown ups habitat habitats head on horizontal horizontals island islands lindblad expedition lindblad expeditions lindblad landscape male males men natural phenomena natural phenomenon natural world natural worlds nature naturally outdoors outside place of interest run running site of interest sites of interest splash splashed splashes splashing sgoa ship ships small group of animals south south pole to run travel travelled travelling travels vessel vessels water s083 s083 te s083 prm