Madrid, the capital of Spain, is known for its art, architecture and nightlife. It has many cathedrals and over 100 museums. Must-see attractions include the Royal Palace, Town Hall, El Retiro Park, Prado Museum, Puerta del Sol and Plaza Mayor. Madrid is also famous for its nightclubs located in La Latina, Tribunal and Gran Via areas. Barcelona, Spain's second largest city, is a major port located on the Mediterranean coast. It has become a top tourist destination with sights like La Rambla boulevard and La Placa Catalunya square. A sample itinerary includes visits to Madrid and Barcelona over 6 days, with optional day trips to Toledo and Montserrat