Antarctica

Antarctica is the ultimate frontier for adventure travelers, with 3.6 million square miles of untouched ice. Each season, roughly 30,000 passengers cross the Drake Passage, but they explore only 1% of the continent's coastline. This scale dwarfs #5 Galápagos Islands' compact archipelago, where landings are measured in hectares. Watch penguin colonies of 100,000 birds on ice shelves older than 40 million years. The silence, broken only by calving glaciers and whale blows, creates a travel experience that no other destination can match.