The Haush in particular made regular trips to Isla de los Estados suggesting that some of them may have been capable of reaching the islands near Cape Horn .
Isla de los Estados was 29 kilometres ( 18 mi ) from the main island of Tierra del Fuego .
The Haush in particular made regular trips to Isla de los Estados , which was 29 kilometres ( 18 mi ) from the main island of Tierra del Fuego , suggesting that some of them may have been capable of reaching the islands near Cape Horn .