Wanderlust is a wonderful affliction: a good trip can completely change your perspective about the world, other cultures, and yourself. That's why we're profiling some of history's most audacious explorers, just in time for Earth Week. Since we've all heard about adventurers like Jacques Cousteau, Ernest Shackleton, or Captain Cook, we decided to focus on people a little more off the beaten track — literally! These brave explorers may not be as famous as Magellan or Columbus, but they share the same restless spirit and bravery in the face of the unknown. Perhaps you'll be inspired to follow in their footsteps...or make tracks of your own!