Spain welcomes vaccinated visitors from most countries, as well as European visitors who can prove they are not infected. Most other non-Europeans need an official vaccine certificate by a U.S. health authority.Great Mosque of Cordoba : Cordoba mosque is one of the largest in the world and the finest achievement of Moorish architecture in Spain. Great Mosque ranks with the Alhambra in Granada as one of the two most splendid examples of Islamic art and architecture in Western Europe.Prado and Paseo del Artes: Prado alone ranks with the world's top art museums for its rich collections. Add the Reina Sofia National Art Museum, the Thyssen-Bornemisza Museum and the CaixaForum- all these attractions are waiting for tourists. San Lorenzo de El Escorial : San Lorenzo de El Escorial, was the summer home of Spain's kings. In 1563, work started here on a huge complex, which included a monastery, church, royal palace, mausoleum, library and museum, now serves as a major tourist attraction.37 TTW World