The Vikings got to northern Canada around the twelfth century. Remnants of a Viking village were discovered in a place call L'Anse aux Meadows (current population 32). This is now a World Heritage Sight. We also visited Corner Brook, a very pretty city in southern Newfoundland.
Nova Scotia
There is no documentation that the Vikings got this far, but they may have. Cape Breton Island is very pretty but economically depressed. Halifax, further south in the province, is one of North America's most underrated cities.