If you do just one thing in the Munising area, make it the marvelous two-hour Glass Bottom Boat Tours (1204 Commercial St., Munising, 906/387-4477, www.shipwrecktours.com, June–Sept., $20 adults, $8.50 children under 13). Pete Lindquist, an experienced local who also operates a dive charter, came up with the idea of installing viewing wells in the hulls of a couple of tour boats, so even nondivers can marvel at the area’s shallow-water shipwrecks.

The view through the 8- to 10-foot-long windows is truly remarkable. The boat glides directly over shipwrecks, some in as little as 28 feet of water. They fill the viewing windows like historic paintings, perfectly visible in the clear water and looking close enough to touch. On the Bermuda, you can easily make out deck lines, hatches, even piles of iron ore lying on the deck.

Weather permitting, the tour visits three shipwrecks, dating from 1860 to 1926. Along the way, Lindquist’s knowledgeable crew also shares history and points out features (including the wooden East Channel Light) along the shore of Grand Island.