There is a moment, walking through one of Boulder’s older neighborhoods on a slow May morning, when you understand exactly what someone fell in love with - the rough-cut sandstone foundations, the leaded glass over the front doors, the porch ceilings painted in colors that have outlasted three generations of repainting. The houses in Mapleton Hill, Whittier, University Hill, Newlands, and the residential pockets around Chautauqua were built in a way that is no longer being bu