Helicopter pilots are in constant danger of action stars climbing aboard their craft and throwing them out; kayakers, however, need only fear falling helicopter pilots. Steer an unstealable vessel with today's Groupon: for $79, you get a Cape Cod Bay kayak tour for two from Cape Kayaking in Eastham (a $120 value).

Cape Kayaking’s sea-kayak tours meander through the marshes, bays, and rivers of Cape Cod Bay, granting paddlers a close look at scenic panoramas and wildlife. Owner Jonathan Palino outfits soon-to-be-captains with everything they need for aquatic expeditions, including solo sea kayaks, life vests, paddles, and rub-on compass tattoos. Two tours leave each day at 9 a.m. and 2 p.m., giving visitors the chance to explore Nauset Marsh and Pleasant Bay. Head south on Nauset Marsh and weave through a maze of sandbars, marsh walls, and tidal flats, where your guide will explain clamming techniques. Voyagers who journey north troll past the Coast Guard Station and Outer Beach, where wayfarers can rest, watch birds nesting in dunes, and peep at seals fishing.

Interesting histories abound, including tales of the native settlements, boat-building shops, and landforms resembling Eleanor Roosevelt. Travelers should come prepared with essentials including bug repellent, a hat, sunscreen, and footwear that can get wet, such as water shoes, strap sandals, or old sneakers. Cape Kayaking's trips are appropriate for all experience levels, and tandem kayaks are available for children who require assistance and adults with corporeal shadows.