The Australian government is planning a new monument to commemorate the April 29 anniversary of the day that British explorer Lt. James Cook made landfall on the continent for the first time in 1770.

The feature is to be built at the Botany Bay landing site where crew members of the British ship Endeavour first met Aboriginal people, changing the course of the nation's history, in time for the 250th anniversary, in 2020.

Not everyone is happy about the Cook memorial in the Pacific nation which has seen recent conflict over whether commemorating the English colonialists is offensive to the country's indigenous people.