Take your choice of deep sea fishing, whale watching, or a "floating classroom," educating visitors about the ecology and biological diversity of the ocean. These are in-depth tours, taking up a good part of the day. From the Sagamore Bridge take Route 3 north to Exit 6A, to Route 44 east. Follow to the end, and enter the traffic circle. Look for the Capt. John Boats sign. Prices and times of departure vary. Call or check their website for details.