Where was it filmed?

Does anyone know where it was filmed? Some of the outdoor parts in the later episodes almost look like it could have been at the WB Studios. I know it was on NBC and CBS or whatever, but that doesn't mean it was filmed at their studios. A lot of shows on those networks are actually filmed at WB ("Without a Trace," "ER," "Everybody Loves Raymond," "West Wing," etc.) Just wondering...

We speak each other's unspoken language... fluently.