Tucked in the far southwest corner of Dallas County is 300 acres of peaceful trails and a nature preserve that will take you away quicker than a tub full of Calgon. The parking lot can get crowded, but walk a hundred yards along any of the trailheads and you're quickly, sometimes eerily, alone. Make what you want of the outing: an easy walk to the pond or an intense hike. Or better yet, bring a hammock or towel to perch atop the limestone escarpment that overlooks the Blackland Prairie. Inhale the good air, exhale the bad air. Don't freak out about the snake signs unless that's something you're prone to do. Just stick to the trails. Signage is ample, making navigation simple.