Also in Mackinaw City is the Coast Guard's Icebreaker Mackinaw, which is open to the public. This amazing vessel has the equivalent of six locomotive engines. Guided tours will take you on a fascinating glimpse into not only the treacherous science of icebreaking, but also the history of our country and the important role that the Icebreaker Mackinaw played after the attack on Pearl Harbor, during World War II.