Final answer:
The island in question is Newfoundland, part of Newfoundland and Labrador, known for the historic Viking settlement L'Anse aux Meadows and Gros Morne National Park, and was England's first overseas colony.
Step-by-step explanation:
The island you are referring to is Newfoundland, which is a large island off the east coast of the Canadian mainland and is part of the province of Newfoundland and Labrador. It is separated from the mainland by the Strait of Belle Isle and from Cape Breton Island by the Cabot Strait.
The Viking explorer Leif Eriksson referred to part of this region as Vinland, and the historic L'Anse aux Meadows, a Viking settlement, is located here. Moreover, Gros Morne National Park is also found on Newfoundland, celebrated for its stunning landscapes and geological significance.
The island was claimed by Humphrey Gilbert for England in 1583, marking the establishment of England's first overseas colony.