Vintage trolleys in San Francisco

Public transit fans have long loved San Francisco, with its cable cars.  Less well-known, but almost as much fun to ride, is the city's "F" line - a collection of vintage trolleys from several countries, all lovingly restored.  Their route runs along Market Street from the Castro district to the waterfront, where it turns and continues to Fishermen's Wharf.  It's a fun way to get around SF.