Maps

Check Out These Maps (PDF maps require Acrobat Reader) (it's free!)

Yahoo maps and driving directions
Maps of the Berkeley Campus
San Francisco Bay Area (PDF format 341KB)
North Coast (PDF format 503KB)
High Sierra (PDF format 503KB)
Mother Lode (Yosemite to Tahoe, PDF format 437KB)
Recent California earthquakes
These and more PDF format California maps are available at a site run by the California Division of Tourism
For total coverage of the US try the US Census' Tiger Map Browser
For maps of the entire planet, take a look at the Xerox PARC Map Viewer, or the Yahoo world maps page
"Maps" of the universe, as viewed for earth, are available form this Star Charts web site. I found a nice program there called Home Planet.