Explore the fascinating intersection of string theory, Feynman integrals, and tropical geometry in this comprehensive lecture. Delve into the physics background, including Feynman rules and string diagrams, before examining the tropical limit of string theory. Discover tropical graphs, moduli spaces, and their applications to string amplitudes. Learn about the field theory limit and its implications for tree-level calculations. Conclude with a discussion of open questions in this cutting-edge area of theoretical physics and mathematics. Gain insights into the connections between combinatorial algebraic geometry, tropical geometry, and quantum field theory through this advanced presentation by Piotr Tourkine at the International Centre for Theoretical Sciences.