Typically, a descriptive essay http://essaypro.com/blog/descriptive-essay is assigned by instructors to develop students' abilities to create and interpret images. It is intended to paint a vivid picture of a topic to the reader. It should also evoke a sense of familiarity and appreciation in the reader. Traditionally, sources for descriptive essays include books, newspaper articles, magazine posts, and scientific journals. You can also use trusted websites.