Even though water covers most of the earth's surface, humans spend most of their lives on land and a small portion in the air while they’re sleeping. Float on with this Groupon.

$52 for a Half-Day Rafting Adventure (a $105 Value)

At noon, rafters meet to then launch into the water for a 5-hour, 10-mile trip down the Kings River. Originating in the mountains near Sequoia National Park, the wide river takes rafters through high-speed rapids and slower, scenic waterways. Along the way, guides teach groups necessary skills and help boats to stay on course. Though lunch is not included on this trip, they supply all requisite gear and waterproof bags, which can be used to guard each rafter's valuables or protect participating wicked witches. No prior experience is required.

Though Zephyr Whitewater Expeditions sometimes features a discounted price online, this Groupon still offers the best deal available.