The Retiro holds the city's best-known park, Parque del Buen Retiro, and the neighborhood’s borders extend both to the east and west of Madrid’s green lung. The area between the western side of the park and the Paseo del Prado, which used to be part of the park until it was sold to the Estate and built during the rule of Isabel II, showcases some of the city's most exclusive, expensive, and sought-after real estate. The area on the opposite side of the park is livelier, with many quality tapas bars and less expensive restaurants.