Imagine living in the grace and serenity of a home designed by Rancho Santa Fe's most iconic architect.      "Lilian Rice was acclaimed for her attention to site and local context." This is apparent in this 1924 Spanish-Colonial treasure. Casa Collado ( House on the Hill) is      located centrally in the historic village of Rancho Santa Fe, an easy walk to shops, school, golf and tennis clubs and miles of trails, the parklike 3/4 acre property backs to open space and is a haven of peace and privacy. A pool and charming courtyard with fountain are all true to the original vision of Ms Rice. Likewise, the interior appointments; wood floors, fireplace and built-ins, all  wonderfully unadulterated.      There are three bedrooms and three bathrooms, living and library, in 2562 square feet. The primary bedroom is set apart, a couple of steps up from the main living area. The third bedroom lends itself to becoming an office, media room or gym. Don't miss this rare opportunity to own the quintessential covenant classic.