When I was a kid, I spent many hours browsing through my great aunt's print edition of The Columbia Gazetteer of the World. The result? I am very good at answering crossword clues such as "a river in Afghanistan."*
Now, you can try out the new online version for free. The username is eviewsblog. The password is ljgaz. Free access ends on January 11, 2009.
*If it begins with A and has seven letters, it must be Andarab.