Tlon is a fictional planet created by the Argentine writer Jorge Luis Borges in his short story "Tlön, Uqbar, Orbis Tertius." In this narrative, Tlon is depicted as a world with a unique philosophy and language that challenges conventional understanding of reality. The inhabitants of Tlon perceive the universe differently, emphasizing idealism over materialism. The story explores themes of perception, reality, and the power of ideas. As Tlon's influence spreads to Earth, it raises questions about the nature of existence and the impact of fictional worlds on human thought. Borges uses Tlon to illustrate the fluid boundaries between reality and imagination.