At first glance, Sanlúcar la Mayor looks like a sleepy country town, but its surrounding olive groves and vineyards hide fascinating buildings both old and new … from the world’s biggest solar platform to one of Europe’s most important dolmen burial chambers, built 5,000 years ago at nearby Valencina.  Another must visit place is the stunning alquería or fortified manor farmhouse Hacienda Benazuza, built by the Arabs in the tenth century and now a fabulous hotel with a two star Michelin restaurant.