If you like triangular buildings, the original Apple HQ was: 5300 Stevens Creek Blvd San Jose, CA 95129 Until around the early 1990's, it had the multicolored Apple II logo on the side facing I-280. Accolade with Peter Harris was a tenant at one point.
I don't think that was the original Apple HQ, I think it was just one of many buildings that Apple occupied around Cupertino in the '80s.
(Semi-related trivia: Bioware's office in Austin is a copy of Apple Infinite Loop.)