Escape the city and find a moment of zen at McKinney Falls State Park, just 20 minutes from central Austin. Nature beckons, so go on a solitary retreat or take some company for a dip in the swimming hole. You'll feel like you're on the moon, if not quite over it, near the Lower Falls, where the rock surface looks faintly lunar. Enjoy fishing, biking, hiking, and camping. Many of the paths are stroller-friendly, and none of the hikes exceed an hour and a half, so you can get active without too much of a commitment. The Homestead and Flint Rock trails involve crossing the slippery creek, so take a pair of aqua shoes. You'll spot turtles and other wildlife, including feathered cuties like the northern cardinal, the painted bunting, and the blue jay. A word to the wise—don't go swimming after the rains because the water quality does deteriorate.