Kauai Backcountry Tubing Adventure

$106; watershoe rental, $3.

On this soft adventure, participants tube through the ditches, tunnels, and flumes that once irrigated a sugar cane plantation. Locals call it "flumin' da ditch." Transportation to the ditches is via a 1972 six-wheel yellow Swiss Army vehicle made in Austria. The 45-minute journey takes you through wide-open cow country dotted with herons. There is no whitewater or paddling here. Just a gentle 2 ½-mile float along some abandoned irrigation pipes. Most of the float trip is in the dark, through five narrow hand-dug tunnels. Our young guide said playfully, “We are not allowed to initiate, but we are allowed to retaliate. Splash once, we splash back. Twice, and we might flip you over.”