Why is it that people who spend time at the beach seem so upbeat? Is there something about the environment that lends to optimism? Take a moment to close your eyes and imagine these two scenarios. In the first, you are walking through a crowded city. People are packed like little sardines in business suits rushing to catch their buses, get their coffee and hurry off to work. What do their faces look like? How do they carry themselves—what’s the message in their body language?