 Nikolai Mikhaylovich Albov is credited with being the first European explorer to have traveled extensively over an archipelago off the southernmost tip of the South American mainland across what strait?         
Strait of Magellan
Title: Tierra del Fuego
Passage: Tierra del Fuego ( , ] ; Spanish for "Land of Fire") is an archipelago off the southernmost tip of the South American mainland, across the Strait of Magellan.  The archipelago consists of the main island, Isla Grande de Tierra del Fuego, with an area of 48100 km2 , and a group of many islands, including Cape Horn and Diego Ramírez Islands.  Tierra del Fuego is divided between Chile and Argentina, with the latter controlling the eastern half of the main island and the former the western half plus the islands south of Beagle Channel.  The southernmost extent of the archipelago is at about latitude 55 S.
Title: Nikolai Albov
Passage: Nikolai Mikhaylovich Albov (Russian: Николай Михайлович Альбов , 15 October 1866 — 6 December 1897, La Plata, Argentina) was a Russian botanist and geographer.  He made his mark first as an explorer of the Caucasus, to which he made several extensive trips financed by the Swiss Botanist Society, and later, after having moved to Argentina in 1895, of the Southern regions of South America.  He is credited with being arguably the first European explorer to have traveled extensively over Patagonia and Tierra del Fuego and (writing in Russian and French), described its flora.
Title: Antarctic Peninsula
Passage: The Antarctic Peninsula is the northernmost part of the mainland of Antarctica, located at the base of the Southern Hemisphere.  At the surface, it is the biggest, most prominent peninsula in Antarctica as it extends 1300 km from a line between Cape Adams (Weddell Sea) and a point on the mainland south of Eklund Islands.  Beneath the ice sheet which covers it, the Antarctic Peninsula consists of a string of bedrock islands; these are separated by deep channels whose bottoms lie at depths considerably below current sea level.  They are joined together by a grounded ice sheet.  Tierra del Fuego, the southernmost tip of South America, lies only about 1000 km away across the Drake Passage.
Tierra del Fuego Nikolai Albov