For those who love history and architecture, it is hard to beat the allure of a mission. Strung together by the Spaniards, they are a network of some of the oldest structures in America. One of the most significant and intact is Mission San Juan Capistrano; it is home to the last remaining chapel where Saint Junipero Serra celebrated Mass, ruins of a grand stone cathedral, and of course migrating swallows. Yes, the swallows have returned, albeit fewer than in the past. Initially founded on October 30, 1775, the Mission was abandoned just a few weeks later, when word arrived of a revolt in San Diego. Soldiers and padres alike…