Teddy Daniels: Baby, I love this because you gave it to me, but it is one fuckin' ugly tie.
When Leo is laying his dead kids on the grass, the little girl keeps moving her eyes and breathing.
During the ferry approach at the start, we are shown Shutter Island. In actuality this is a combination of Peddocks Island (the decaying brick buildings), Maine's Acadia National Park, Massachusetts' Medfield State Hospital, and Turner Hill Country Club's Rice Estate (located in Ipswich, MA), which were combined via CGI. Additionally, the mountainous region of the island (shown as the ferry approaches) was also CGI, and added in post-production.