CAMERON DAVIDSON Kayaking on the waters of the Eastern Shore near Assateague Island canoe or kayak are great, lowimpact ways to experience what the Nature Conservancy has called "one of the last places in the U.S. worth protecting." HOA Tubing on the James River at Hattons Ferry, near Sco ttsville lighted fishing bridge in Clarksville. The underwater lights attract thousands of feeder fish that lure in the big ones. SO 42 JOHN HENLEY TREE-CLIMBING Go "vertical" with the timeless childhood pursuit of tree climbing: Go Ape, an interactive treetop adventure, Williamsburg. HR Blue Ridge Tree Climbing, Meadows of Dan BR Riverside Outfitters in Richmond offer tree climbing courses and experiences. CN ONLY IN VIRGINIA ZIP-LINING The Clinch River, one of the most bio-diverse rivers in North America, is home to more than 400 rare plant and animal species. Streamside fishing or launching a Fly through the air on a zip-line adventure at Massanutten or Bryce Resort or ride the 900-foot zip line at Wilderness Adventure at Eagle Landing. SV