Madrid is located just northeast of the geographical center of the Iberian Peninsula, in the middle of the Spanish central Castillian plateau (Meseta central), at an average altitude of 650m. Nearly all of the most famous tourist areas are located in the center of the city including Puerta del Sol, Plaza Mayor, Palacio Real, and Plaza de Colón. The major streets in Madrid include the Gran Via, Alcalá Street, and Paseo de la Castellana.