Perched on the ragged southern edge of Argentina, where the snow-capped Andes fall away into the churning sea, Ushuaia has a frontier town feel to it, and serves as the base for expeditions into the icy waters of Antarctica.

Antarctica is the world’s last great wilderness, an alien landscape of snow-covered mountains, jagged icebergs and extraordinary wildlife. March is too late to see penguin chicks, and temperatures are getting colder, but it’s a great time to spot whales, with species including humpback, sperm and orca. Expedition trips will spend time exploring the Antarctic Peninsula, making several landings at various sites and cruising through scenic channels.

The weather-beaten city of Punta Arenas is a laid back and welcoming place, in spite of its inhospitable location on the shores of the Strait of Magellan. Nearby attractions include penguin colonies and the dramatic scenery of Torres del Paine National Park, while beyond the horizon lie the frozen wastes of Antarctica.

The little fishing village of Caleta Tortel hugs the base of a mountain, perched above turquoise waters fed by glaciers. There are no cars or horses in Caleta Tortel - instead, the piers and houses are connected together by a remarkable network of wooden boardwalks.

Rugged and unspoilt Chiloé, situated at the southern end of Chile’s Lake District, is a unique and culturally distinct island that stands apart from the rest of the country. The main town, Castro, is notable for its colourful waterfront homes on stilts (known as palafitos), and is the gateway to the dense forests and rolling hills of the island interior.

Puerto Montt is the capital of the Chilean Lake District, spread out around a wide bay against a backdrop of snow-capped volcanoes. This wild region offers a host of outdoor activities, including mountain hikes, kayaking, white water rafting, fishing, zip lining and cycling.