With an incredible array of wildlife, Macquarie Island (or Macca) is a World Heritage Site and a wonderful spot to visit as part of an Antarctic cruise. In particular, cruises that visit Macquarie Island visit the colonies of King, Gentoo and Southern Rockhopper Penguins. There are also Royal Penguins (almost one million breeding pairs!) and Macquarie Shags, which are an endemic species. Elephant Seals are also present, as well as various fur seal species such as the New Zealand Fur Seal.
Other sites of interest that you'll visit as part of the cruise include the Ross Ice Shelf in Southern Antarctica, Petermann Island on the Antarctic Peninsula and Detaille Island, just south of the Polar Circle.
Map of Macquarie Island