You're rarely guaranteed to see a whale, unless you go to the aquarium or you're watching Free Willy very carefully. For passengers with Plymouth Whale Watch, however, sightings are guaranteed—if you don't see a whale on your trip you can come back again until you do see one. The expert crew helps passengers spot species from humpback whales to pilot whales during trips that traverse North Atlantic waters en route to Stellwagen Bank. On the boat's lower deck and roomy sun decks, passengers might also spot porpoises, seals, and dolphins. Between sightings, patrons can listen to the crew's historical tidbits about Plymouth, and head to a galley that's stocked with food and drinks.