Contains images of tens of thousands of maps of the world's nations, major cities, state outline maps and more, including a regularly updated maps of current interest section

Gateway to maps, aerial photograhps, satelite images and data available to view, download, and purchase from the USGS.

FEMA Flood Maps and other Flood Risk Products.

Google Earth compatible files, static maps which can be printed, several interactive mapping tools, and geospatial data

First-time visitors should read the "Introduction" area and then browse through some of the map indexes. The site also includes technical information on the collection, and a selection of "Search Strategies". Some of the maps here document 17th century London, the Revolutionary War, and towns in Massachusetts. The detailed search engine allows users to search by collection, keyword, and those records that have digital objects.

A large number of atlases and photos. Of interest is the periodical historical atlas of Europe, which allows you to see Europe at the beginning of each century. A commercial site, complete with ads and a shop, but lots of free info.

A collection of published and open access maps of freshwater biodiversity, along with an interactive mapping tool and geospatial data.

SEDAC is part of the Earth Observing System Data and Information System (EOSDIS) of NASA, and it is hosted by Columbia Univeristy. It has a large number of interesting environmentally-themed maps.

From the US Department of Agriculture, provides county-level data on a range of social, economic, and agricultural data.

From the National Association of Counties, an interactive map with multiple indicators and county profiles.

The Sanborn Fire Insurance Maps Online Checklist provides a searchable database of the fire insurance maps published by the Sanborn Map Company housed in the collections of the Geography and Map Division. The online checklist is based upon the Library's 1981 publication Fire Insurance Maps in the Library of Congress and will be continually updated to reflect new acquisitions.