Muir Island

Muir Island is home to Moira MacTaggert.

In the second X-Men movie, X2, Stryker's computer displays a desktop folder labeled "Muir Island".

In a scene of the third X-Men movie, X-Men: The Last Stand, Professor X shows a video of Moira MacTaggert on Muir Island. A scene after the credits also takes place on the island.