Guesalaga Peninsula is a small, L-shaped, low-lying shingle covered peninsula on the east side of Discovery Bay, Greenwich Island in the South Shetland Islands, Antarctica forming the northwest coast of Iquique Cove and the north side of its entrance. The feature is projecting southwestwards and wide, with the narrow shingle Reyes Spit () extending southwestwards from its west extremity Reyes Point () into Discovery Bay. The Chilean Antarctic base Arturo Prat is situated on the peninsula. Guesalaga Peninsula is named after Captain Federico Guesalaga, leader of the 1947 Chilean Antarctic Expedition in the frigate Iquique and the transport ship Angamos that established Arturo Prat Base, while Reyes Point and Reyes Spit are named after Navigation Second Sergeant Camilo who was in charge of navigation instruments in the Iquique. Location The peninsula is centred at which is south-southwest of Ash Point, north-northeast of Ferrer Point and southeast of Spark Point (Chilean mapping in 1951 and 1971, British in 1964 and 1968, and Bulgarian in 2005 and 2009). See also Composite Antarctic Gazetteer List of Antarctic islands south of 60° S SCAR Territorial claims in Antarctica Maps L.L. Ivanov et al. Antarctica: Livingston Island and Greenwich Island, South Shetland Islands. Scale 1:100000 topographic map. Sofia: Antarctic Place-names Commission of Bulgaria, 2005. L.L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2009. References External links SCAR Composite Antarctic Gazetteer. Landforms of Greenwich Island Peninsulas of the South Shetland Islands