This document provides a summary of sights to see on a walk around Madrid, Spain. It describes several prominent landmarks in the city center, including the Royal Palace from the 18th century, Almudena Cathedral from the late 19th/20th centuries, and Plaza Mayor square. It also mentions popular parks like El Retiro, iconic structures like the Cibeles Fountain, and world-renowned art museums such as the Prado, Reina Sofia, and Thyssen Museum.