511.org
San Francisco Bay Area travel guide. Detailed route maps, schedules, and trip planner. Very informative. travel info by phone - call 511 (service in Bay Area)

sfmuni.com
San Francisco Municiple Railway (Muni) provides cable car, street car, trolley and bus service to the city.

bart.gov
Bay Area Rapid Transit (Bart) provides electric train service throughout San Francisco and the Bay Area. Get off at the Powell St. station and catch a cable car at Hallidie Plaza (Powell & Market).

streetcar.org
Market Street Railway is dedicated to the preservation of San Francisco's historic streetcars.

cablecarmuseum.co.nz
Wellington Cable Car Museum. Wellington's cable car service started in 1902 and ran for 76 years. It was replaced with new technology in 1979. Located in the original winding house the museum has restored 3 original cars.

cable-car-guy.com
Site run by local cable car enthusiast Joe Thompson. Loads of info about all things cable car.

San Francisco Historical Photograph Collection
The San Francisco Public Library has a great collection. A.S. Hallidie headed the drive to open the SFPL in 1879. sfpl.org

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Transit