Bay seniors curious about what seriously extravagant holiday decorations look like might want to head south to our most magnificent monument to egomania – the Hearst Castle in San Simeon. It has been festooned as it was 90 years ago when William Randolph Hearst threw extravaganzas for his staff’s children who could pick any present they wanted from under the dozens of Christmas trees. The most over-the-top tours are the Grand Room and Evening ones. Nov.29-Dec.31 except for Christmas and New Year’s Day. $25-36 for adults, $12-18 for children.