This helpful teaching tool from the United States Geological Survey brings together the comprehensive geological and topographical maps of the United States. As the site suggests, "... this digital tapestry outlines the geologic story of continental collision and break-up, mountain-building, river erosion and deposition, ice-cap glaciation, volcanism, and other events and processes that have...

Military maps continue to fascinate the general public, and this collection from the American Memory Project at the Library of Congress will be of great interest to those with a penchant for American history and cartography. This particular collection contains maps collected and used by Jean Baptiste Donatien de Vimeur, comte de Rochambeau during the American Revolution. Rochambeau served as the...