A friend and I are going to Spain and Italy in about 3 weeks. We already have a Eurail pass, but certain train reservations will definitely need to be made. We are planning on flying into Madrid on a Sunday around noon, probably taking the metro into the city, and taking the AVE to Seville the next morning (Monday). Tuesday morning we figure on going to Granada, and returning to Madrid Tuesday evening, followed by a trip to Barcelona on Wednesday (possibly stopping in Zaragoza for the World's Fair). I realize most of these trains will require reservations, but do I need to make any of them before we leave here, or can we expect to get reservations for the train to Seville at the TI in Barajas when we arrive on Sunday?