This is a collection of trailblazing journeys into the unknown that have had a profound effect on our understanding of the world, transformed the way we live and inspired generations. Each short chapter will focus on a groundbreaking journey and the scientific endeavour that made it possible, from the new navigational instruments used to discover a new country or hidden city, to the advances in engineering that have made it possible for us to explore the depths of the ocean, to the rocket science that has propelled us into space. From the moon to Mount Everest, this is a book about adventure, our thirst for knowledge and pushing the limits of human endurance.