| Perry-Castañeda Library Map Collection (many maps are public domain) | Mostly public domain. Kind of heavy on CIA maps. | |
| MSN 'TerraServer' | Satellite imaging, topographic maps, aerial photographs. Limited to United States. | |
| 'Google Directory - Reference - Maps' |
| The maphistory.info "Map History / History of Cartography" Images of early maps on the web page |