The document provides a brief history of train travel, starting with the first train in India in 1853 from Bombay to Thane, and discusses some early engineering feats like the Darjeeling loop constructed in 1880. It then discusses the opening of the London Underground in 1863 as the world's first underground railway system, and the opening of the Buenos Aires metro in 1913 as the oldest in Latin America. Finally, it mentions that the future of travel will involve riding trains in Bengaluru with a clean conscience.