Wikimedia
Wikipedia: Curling
This article on curling provides a history of the sport, as well as "basics of the game," information on the playing surface, players and equipment. Includes a "graphical depiction of a curling sheet," photographs of equipment and a lot...
Other
The Curler's Web Manual
Here is the index page for "The Curling Manual," a site that covers everything you want to know about curling. Those new to the topic can start here to learn about equipment, moves, types of shots, the playing surface, and more. Also,...