Diners, Drive-ins and Dives: Timeless

This trip Guy's rolling out for some timeless traditions. In Cambridge, Mass., a Greek joint where two brothers are serving the same spit-roasted lamb they loved growing up. In Nashville, a Cajun joint doing a classic bayou crawfish boil with house smoked sausage. And in Silver Spring, Md., a 19th century post office turned restaurant cranking out American standards like corndogs and chicken 'n waffles.