The Lindblad Expeditions ship National Geographic Explorer pushes through ice in Crystal Sound, south of the Antarctic Circle

antarctic circle antarctic ocean color color image color images colour colour image colour images crystal sound days day great southern ocean high angle view high angle views high angle high angles high angle views high angle view horizontal horizontals iceberg ice icebergs lindblad expedition lindblad lindblad expeditions landscape national geographic explorer no one no people no person no body no one nobody outdoors outside south polar ocean southern ocean transportation transport s051