Imagine life in Victorian America, before the world was fully surveyed, where railroads were extending their first tendrils across the country, and industrialization promised to change everything. This was an era when travel was uncommon and the newly charted world was experienced in living rooms through beautiful atlases. Comparative maps, diagrams showing features of the earth side-by-side for the purpose of studying their sizes, are a unique element of 19th century cartography, not seen before and little seen after. These illustrations run the gamut from imaginary vistas to graph-like drawings, all serving the purpose of teaching visually about the world. They chronicle changing world knowledge, human accomplishments, and ideals of data visualization. This volume walks readers through the world of enchanting comparatives, paying attention to changes in the genre and highlighting their beauty.