While navigating the waves, remaining upright is vital for spotting the edge of the earth in time to savor how wrong science was. Stand up to geology with today’s Groupon to SUP Shack, formerly known as Tri Shop Santa Cruz. Choose between the following options:

• For $12, you get a two-hour standup-paddleboard rental (a $25 value).
• For $30, you get a 90-minute beginner standup-paddleboard lesson (a $60 value).<p>

Founded by endurance enthusiast Trudie Ransom, SUP Shack trains beginning boarders with provided equipment and equips athletes partaking in paddleboarding pastimes. Board rentals keep aqueous explorers on a standup steed for up to two hours of watery mischief in the Santa Cruz Harbor as they tone their cores and maintain upright equilibrium while fending off chain-swinging porpoises. Alternatively, by the end of a 90-minute lesson, confident swimmers with no prior surfing, paddling, or standing experience can glide around the water, having absorbed the basics of standup paddling.<p> Though SUP Shack sometimes features a discounted price online, this Groupon still offers the best deal available.