Google Maps

Acme mapper

Google Maps Mania (just Los Angeles)

Find Housing
Zillow (famous TV homes)
Virtual Sightseeing
Virtual Panoramas
Superfund sites
San Andreas fault trace map
The Police world tour 2007
Baseball parks
Tour de France 2006
College Football
London Underground (the old map)
NYC subway (enhanced)
My bike commute
Beer maps: site #1 and site #2