Since the dawn of humanity, man has longed to conquer the open water, which is why the invention of the boat was followed swiftly by the adoption of the high-five. Celebrate man's triumphs with today's Groupon: for $85, you get a Savannah River history tour for two from UnReel Expeditions in Thunderbolt (a $170 value).

Helmed by certified skippers, the history tour glides along the Savannah River for up to two hours, passing gnarled tree stumps and bleached driftwood as a Clemson University certified naturalist narrates the river's rich past. Aboard one of the four fishing boats in UnReel's fleet, an intimate gathering of no more than six aquanauts traverses the waters, spying sea turtles and birds while imagining early colonial settlers interacting with the Cherokee tribes. While learning about the city’s role in the Revolutionary and Civil Wars, guests snap pictures of bottlenose dolphins and shrimp donning period-appropriate hats with Fort Jackson looking on in the background.