You don't have to be a birder to enjoy Audubon center. After paying a small fee, all you need for a lovely, quiet, relaxing afternoon hike are a bottle of water, a decent pair of shoes and an appreciation for the great outdoors. The 205-acre forest offers a 1.1-mile trail that includes some hilly but manageable terrain and a wheelchair-accessible canyon floor trail that's a half-mile round trip through an ecosystem featuring a stand of flowering dogwoods unique to North Texas. It's 16 miles from downtown, just close enough and far enough for a spur-of-the-moment escape.