Muslim Walls of Madrid Muslim Walls of Madrid The Muslim Walls of Madrid, also known as theArab Walls of Madrid, of which some vestiges remain, are located in the Spanish city of Madrid. They are probably the oldest construction extant in the city. They were built in the 9th century, during the Muslim domination of the Iberian Peninsula, on a promontory next to Manzanares river. They were part of a fortress around which developed the urban nucleus of Madrid. They were declared an Artistic-Historic Monument in 1954. The remains of utmost importance, with more archaeological than artistic interest, are in the Cuesta de la
Madrid In addition, mushrooms often emerge after the first rains of autumn. Finally, the river groves, or riparian forests, are made up of various, mainly deciduous, species that grow in wetter areas. Examples include poplars, willows and alder trees. As regards fauna, this green space is home to approximately 133 vertebrate species. The Royal Botanical Garden of Madrid ("Real Jardín Botánico de Madrid") is an 8-hectare botanical garden located in the Plaza de Murillo, next to the Prado Museum. It was an 18th-century creation by Carlos III and it was used as a base for the plant species being collected across