Antarctica is the northernmost part of the Antarctic mainland and lies at the foot of the southern hemisphere. The Antarctic Peninsula, also called Palmer Peninsula, Graham Land or Tierra de O'Higgins, which is claimed by the United Kingdom, Chile and Argentina. Antarctica is the most visited region of the Antarctic. Forecast for the Antarctic Peninsula (Antarctica). Unwind on a Zodiac ride, hike on glittering glaciers, share fun moments with curious penguins or experience the rugged peninsula from a sea kayak.