Launch from Marina Park or Juanita Beach Park's banks and spend two hours paddling across Lake Washington's tranquil waters

Dense forests & natural wildlife flanks trips down Perdido river as groups sip drinks from home-brought coolers; children under 11 free

Buses ferry customers to and from the tubing area on San Marcos River; picnic areas are along the riverbank

Floats last about four hours as 72-degree water refreshes guests lounging on inflated tubes

Instructors teach the fundamentals of science, technology, engineering, and mathematics with challenging robot kits.

Paddleboarders explore the crystal-clear waters of Kings Bay and Crystal River

The EcoPark features the country's first zipline roller coaster, a 68-foot challenge tower, and the longest straightaway zipline in Florida

Students of all experience levels learn to surf off Waikiki Beach atop rental boards and head out to the reefs aboard outrigger canoes

Tour of Gull Island & Kachemak Bay provides close-up views of nesting cormorants & puffins from wide windows of heated, covered cabins

4-, 7-, or 11-mile courses challenge guests with at least two obstacles every mile, such as ropes and beams