Muir Island

Muir Island is a small island off of the northern coast of Scotland. Muir Island's significance stems from the fact that it was the home of Earth's largest and most comprehensive mutant research complex, founded by Dr. Moira MacTaggert. Originally, she created the facility to help her son, Kevin, an extremely powerful and destructive mutant. Muir Island's facility once held a wealth of knowledge on various mutants, their abilities, and other mutant-related issues and concerns. It was also once the home base of the Excalibur. It was used by Professor X to store information on how to kill various X-Men if need be. The island has sometimes been used to imprison mutants for various reasons. The island and its research center have come under attack by many villains. The island's facilities were destroyed by Legion—who was, at the time, possessed by the Shadow King. Although rebuilt, the Muir Island Genetic Research Center was destroyed again in an attack by Mystique and Sabretooth—fatally injuring Moira MacTaggert in the process. To this day, the island and its facilities remain derelict.