Did you ever wonder what it would be like to take a spacewalk? A good face climb is like that, and Quaker Oats is the best introduction in metro Phoenix you can get to the concept. The route's located on a minor rock hill in the McDowell Mountains called Sven Slab — signs will point to the Slab at the Tom's Thumb trailhead. You may or may not find the route without the help of a guidebook (and you might not survive if you're not well-versed in rock-climbing basics). Assuming you've got your requisite gear, belay partner, and have made it to the base of this 100-foot-high route, then it's time to leave the capsule, if you dare. Start making your way up the nearly sheer wall on its often-painful, tiny granite holds. As you rise higher, with vast spaces of vertical rock wall in all directions, all you'll think about is how you don't want to fall. But somewhere along the route, your inner face climber will be born. Fear turns into positive energy that helps keep you from falling. There's no spaceship, no ground, no rush of air like flying an airplane — just the sun, moon, granite face, and you clinging by your fingertips and a smear of rubber from your climbing shoes, mind focused entirely on the next series of holds. When you top out, you've earned your astronaut wings.