Port of Ushuaia, southernmost city in the world. Tierra del Fuego, Argentina. Two ships: the Vavilov and the World, a condo ship. The Scandinavian-built ice-breaker Akademik Sergey Vavilov, originally built for the Russian Academy of Science and still used occasionally by scientists, is now predominantly used for adventure touring in both the Arctic and the Antarctic. The ship is currently operated by a Russian crew, and staffed with employees of the adventure touring company Quark Expeditions, and carries around 100 passengers at a time.