Some of most recent underwater discoveries are located in the 163 square mile Sanilac Shores Underwater Preserve in Lake Huron. These discoveries include the Regina, a 250 foot, steel package freighter that sank in the a fierce gale in 1913. The vessel was discovered in 1986.The Regina rests upside down in 80 feet of water with the structure of the ship rising 25 feet from the bottom.
Some cargo lies scattered on the bottom adjacent to the wreck.
Visibility at this site and throughout the preserve is variable and ranges from 5 to 25 feet. Another popular dive site is the wreck of the Sport, a 57 foot steelhulled tugboat than sank in a gale in December 1920. The vessel lies mostly upright with a starboard list in about 50 feet of water. The structure of the Sport rises about 20 feet from the bottom. In 1992, Michigan's first underwater historical marker was placed on the Sport to inform divers about the historical significance of the wreck.