CIA World Factbook
This site provides detailed national profiles of the world's countries, territories and depndencies. Topics include people, government, economics, communications, transportation, and international issues.

Geography4Kids
This nicely organized introduction to earth sciences for kids includes earth structure, atmosphere, hydrosphere and biosphere, bio-geo-chemical spheres and climate.

Portals to the World
Subject specialists from the Library of Congress provide selected authoritative links for each country of the world.

Other resource guides provide more specific maps and information on the geography of Canada.