Kayaking will always be the best way to simultaneously exercise and savor nature, because trampolines don’t propel people quite high enough to catch sun rays in their mouths. Burn calories while reveling in nature’s delicious beauty with today’s Groupon: for $45, you get three two-hour kayak excursions (up to a $150 value) at Ultimate Watersports. Redeem your Groupon at either of Ultimate Watersports' two locally owned and operated waterfront locations, at Gunpowder Falls State Park's Hammerman Beach or Dundee Creek.

The Gunpowder River is one of the most pristine, wildlife-packed bodies of water on the Chesapeake Bay, heralded in countless books, magazines, and choose-your-own-adventure novels for its vibrant foliage, sparkling water, and cuddlesome critters. Whip paddles across choppy waves when the wind picks up at Hammerman Beach, or absorb eyefuls of lush vegetation while peacefully skimming across Dundee Creek. With this deal, you get three two-hour rentals for a single sit-on-top kayak (a $15/hour value), a double sit-on-top kayak (a $20/hour value), or a double sea kayak (a $25/hour value).

Aqua-paddlers can divvy up the Groupon to take pals into the watery wilderness, as Ultimate Watersports’ waterfront pavilions feature grills for post-kayaking picnicking. Sharpen your kayak prowess by taking three two-hour trips on different days, or take one six-hour endurance extravaganza. Wildlife wanderers can kayak on weekends in May or daily from June–August. Equipment and life jackets are included with rental, and shower and changing rooms are also available. Call ahead to reserve rentals for groups of 10 or more.