Tucked deep inside an inlet on Newfoundland’s mountainous west coast, the working mill town of Corner Brook is the gateway to Gros Morne National Park. The park’s rare features – mantle rock and ancient oceanic crust – are a window onto continental movement 1.2 billion years ago, key factors in its World Heritage designation. Glaciers carved out the spectacular fjords, deep valleys, lakes and beaches. Coastal and forested trails invite exploration, while intrepid hikers can climb the 2,644-foot-tall Gros Morne.

Covering nearly 80 percent of Greenland’s surface, the Greenland ice sheet feeds glaciers across the country. A voyage through Prince Christian Sound offers spectacular views of this ice sheet from the southern tip of the island. The 66-mile-long journey is picturesquely framed by granite mountains soaring over 7,200 feet, slow-motion ice rivers carving through solid rock as they make their way to the water to calve giant icebergs, and meltwater majestically cascading towards the sea.

The demand for a link between Buzzards Bay in the south and Cape Cod Bay in the north goes back to George Washington, whose Continental Army was trapped by a British blockade during the Revolutionary War and had no waterway to retreat to. Completed in 1914, the landmark Cape Cod Canal is the world's widest sea-level canal. Its seven miles of glistening waterway is lined with lush scenery and is occasionally used by whales and dolphins, including endangered North Atlantic right whales.