Commemorate your time at the world-famous Muir Woods National Monument with an "I Walked Among the Redwoods" adventure badge. A walk among Muir Woods' old-growth coast redwoods can be a healing experience. Multiple studies have shown that nature provides reliable boosts to mental and physical well-being, including stress relief; improved short-term memory, concentration, and mental energy; and sharper thinking and creativity. (For more on "Healthy Parks, Healthy People," visit instituteatgoldengate.org)