Isla Gonzalo is a subantarctic island, uninhabited except for a weather and research station operated by the Chilean Navy.

With an area of 38 hectares (94 acres), it is the second largest of the Chilean Diego Ramírez Archipelago after Isla Bartolomé.

The archipelago lies in the Drake Passage between the continents of South America and Antarctica.

It is an important breeding site for black-browed (over 6000 pairs) and grey-headed (over 4000 pairs) albatrosses, as well as for southern giant petrels.

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