Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The term sense of place has been defined and used in many different ways by many different people. To some, it is a characteristic that some geographic places have and some do not, while to others it is a feeling or perception held by people (not by the place itself). It is often used in relation to those characteristics that make a place special or unique, as well as to those that foster a sense of authentic human attachment and belonging. Others, such as geographer Yi-Fu Tuan, have pointed to senses of place that are not inherently "positive," such as fear. Some students and educators engage in "place-based education" in order to improve their "sense(s) of place," as well as to use various aspects of place as educational tools in general.