The Alger Underwater Diving Preserve at Munising was the first preserve established in Michigan and is one of the most popular scuba-diving areas in the Great Lakes. This Underwater Preserve offers several unusual diving attractions including intact shipwrecks, sea caves and underwater interpretive trails.

The sea caves are actually portions of underwater sandstone cliffs where sandstone has been eroded by waves. Although the caves are shallow, usually only about 20 feet deep, they offer spectacular shallow water diving opportunities.

Many of the wreck sites located within the Alger Preserve are protected from Superior’s temperament by Grand Island. Very seldom are dive trips cancelled because of weather. Underwater visibility in the Alger Preserve is considered to be among the best in the Midwest. Thirty feed of visibility at a depth of 100 feet is not uncommon. Mooring buoys and descent lines at all primary dive sites, wrecks at safe diving depths and an emergency evacuation plan all contribute to make the Alger Preserve a safe place to dive.