In 1845 Thoreau leased some land owned by his friend and mentor, Ralph Waldo Emerson on Walden Pond near Concord, Massachusetts, and lived in a cabin on it for two years, two months, and two days. The experience gave Thoreau the chance to make keen observations on the world around him. The result became an American classic: Walden explores not only the soul of the searching Thoreau, but defines what it means to be a truly free person, and distills the essence of our relationship of Nature.