Kayaks are the perfect size for a boat—big enough to cut through choppy waters and small enough that F-15s won't try to land on them. Observe maritime moderation with today's Groupon: for $20, you get a one-day kayak rental from North Island Surf and Kayak in Tybee Island (a $45 value).

North Island Surf and Kayak's durable and dependable rentals transport paddlers into the natural world of Georgia's barrier islands. Kayaks zip through inland rivers, bays, and sinuous creeks with equal deftness and gusto. Adventurers can load the versatile vessels onto cars with the aid of a willing staff or cast off from North Island's floating dock to explore the surrounding territory. Navigate the marshes of nearby Little Tybee Island or climb to the top of Cockspur Beacon and misdirect hapless mariners. From the perch of a kayak, vigilant oar-pullers can commune with the region's native species, including dolphins, otters, and a bevy of avian friends. In addition to the pointy aquatic vessel, each rental comes with a paddle, life jacket, comfortable seat back, and flushing toilet.