Stock photography, photos: Two kayakers rappel a waterfall Stock photos of Two men rappelling down a waterfall while kayaking in the Sierras. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: water sports, action, active, effort, energy, liveliness, perseverance, determination, concentration, motivation, strength, strong, challenge, difficult, adventure, freedom, risk, danger, extreme, radical, wet, man, male, stream, river, California, water, kayaking, kayaks, kayakers, waterfall, rappel, rappelling, teamwork, cameraderie, working together, friends, outdoor, outdoors, outdoorsman, outside, sports, sport, sportsman, recreation, recreational, exercise, exercising, physical fitness, two, 2, people, 20s, twenties, exciting, excite, adrenalin, thrill, thrilling, athlete, athletic, vertical, Coll, Pres