Grand Lagoon (Bulgarian: Голямата лагуна, romanized: Golyamata Laguna, IPA: [ɡoˈʎamɐtɐ ɫɐˈɡunɐ]) is a 1-hectare (2.5-acre) freshwater lagoon of elevation 2.4 metres (7.9 ft) on Bulgarian Beach, Hurd Peninsula in eastern Livingston Island, in the South Shetland Islands, Antarctica.
Formed by Rezovski Creek and separated from sea by a moraine of elevation near 3 metres (9.8 ft).
On the northeast side of the lagoon is the helipad of the Bulgarian base, and on its southwest side — the designated embarkation area and a shed hosting the base's Zodiac inflatable boats.
Bulgarian mapping from a ground survey accomplished during the austral summer of 1995–96.
This article includes information from the Antarctic Place-names Commission of Bulgaria which is used with permission.