In addition to its beginning-of-the-world astonishing beauty, expect two active volcanoes, tens of thousands of Southern Elephant Seals (biggies with really big noses), Antarctic and Sub Antarctic Fur Seals, predatory Leopard Seals, the rarer, slender and pale Crabeater, the plentiful Weddell Seal, and the rare, small, sort-of-sexy Ross Seals famous for their trilling and siren-like sounds.