A large iceberg pictured in the Southern Ocean between the South Orkney Islands and the South Shetland Islands, in Antarctica.

The Greenpeace ship Esperanza is on the final leg of the Protect the Oceans voyage from the Arctic to the Antarctic. The almost year-long voyage is one of Greenpeace’s biggest ever expeditions and highlights the many threats facing the oceans while campaigning for a Global Ocean Treaty covering all seas outside of national waters.