"What To Observe" is a book written by Harriet Martineau, a British social theorist and writer who lived in the 19th century. The book is a guide to help readers develop their observational skills, particularly in the context of travel. Martineau believed that observation was a key tool for learning about the world and understanding different cultures.

The book is divided into several sections, each of which focuses on a different aspect of observation. Martineau covers topics such as geography, history, art, and social customs. She also provides practical advice on how to make the most of your travels, such as how to take notes and how to ask questions.

One of the most interesting aspects of "What To Observe" is Martineau's emphasis on the importance of observing social customs. She believed that by observing how people interacted with each other, you could gain valuable insights into their culture and way of life. Martineau was a feminist and abolitionist, and she often used her observations to critique social injustices and advocate for social change.

"What To Observe" remind us of the importance of paying attention to the world around us and of the value of travel as a means of broadening our horizons and understanding other cultures.