Argentine Antarctica observatory, where he also worked a post office was installed. Civil (employee of the Argentine company official post and telegraph) Hugo Alberto Acuna accounted hoist for the first time in an official way the flag of Argentina on the Argentine Antarctic sector, on 22 February 1904. Such an observatory became the Orcadas Base the oldest existing today across the Antarctic territory permanent human settlement. The Argentine corvette ARA Uruguay returned to Antarctica in 1905 (sailed from the port of Buenos Aires on 10 December 1904) to relieve staffing of the South Orkney and refer to Deception Island and Wiencke Island
Princess Elisabeth Antarctica Princess Elisabeth Antarctica Princess Elisabeth Antarctica, located on Utsteinen Nunatak in Queen Maud Land (), is a Belgian scientific polar research station, which went into service on February 15, 2009. The station, designed, built and operated by the International Polar Foundation, is the first polar base that combines eco-friendly construction materials, clean and efficient energy use, optimization of the station's energy consumption and clever waste-management techniques. Testing phase in Brussels and building construction in Antarctica was coordinated by Belgian main contractor BESIX. The station is built against a ridge (The Utsteinen ridge) that is exposed to gales of up to