Triangulation Beach (Bulgarian: бряг Триангулация, romanized: bryag Triangulatsiya, IPA: [ˈbrʲag triɐnguˈlat͡sijɐ]) is the ice-free 1.5 km long beach on the south coast of Nelson Island in the South Shetland Islands, Antarctica, extending both west and east of the south extremity of the island Vidaurre Point. Its surface area is 24.2 ha. The vicinity was visited by early 19th century sealers. The feature is named after the triangulation method used in map making, in association with other names in the area deriving from the early development or use of geodetic instruments and methods.