"A Line Made by Walking" is a conceptual artwork created by artist Richard Long in 1967. The piece consists of a simple line made by the artist walking back and forth in a field, leaving a visible mark on the ground. This act emphasizes the relationship between the artist, the landscape, and the passage of time. The work challenges traditional notions of art by focusing on the process rather than a physical object. It highlights the idea of land art and the significance of human interaction with nature, inviting viewers to consider the impact of their presence in the environment.