Maps and Atlases
- Civil War Maps (Library of Congress) Recommended by Booklist
- Gilmer Civil War Maps Collection Recommended by Booklist
- MapQuest
- National Atlas of the United States
- National Geographic
- The National Map, from the U.S. Geological Survey; Rated by Choice Magazine as: Recommended
- Old Maps Online, from the University of Portsmouth, UK, and Klokan Technologies, Switzerland; Rated by Choice Magazine as: Recommended
- Topozone: The World's Topographic Map