The '''Ernst Thälmann Island''' ({{lang-es|Cayo Ernesto Thaelmann}} or {{lang|es|Cayo Blanco del Sur}}; {{lang-de|Ernst-Thälmann-Insel}} or {{lang|de|Südliche weiße Insel}}) is a {{cvt|15|km}} long and {{cvt|500|m}} wide Cuban [[island]] in the [[Gulf of Cazones]] that is named after [[Ernst Thälmann]], a German communist politician. During a 1970s state visit to the [[German Democratic Republic]] (East Germany), [[Fidel Castro]] made a promise that Cuba would donate an island to the East German government,<ref name=":0" /> and '''Cayo Blanco del Sur''' was renamed in a ceremony during a state visit by [[Erich Honecker]]. But after the [[reunification of Germany]], when a German newspaper tried to visit the island, they were told this transfer had only been "symbolic".<ref name=":1">{{Cite web|url=https://www.dw.com/en/castros-caribbean-island-gift-to-east-germany/a-36539460|title=Castro's Caribbean island gift to East Germany {{!}} DW {{!}} 27.11.2016|website=DW.COM|language=en-GB|access-date=2019-09-16}}</ref>