Temple of Debod
Egyptian temple with spectacular sunsets. A gift from Egypt, located next to the Plaza de España.
Royal Palace of Madrid
The official residence of the King of Spain (although not inhabited by the current monarchs). With more than 3,400 rooms, it is the largest palace in Western Europe.
Other points of interest
Puerta de Alcalá, Plaza de España, Almudena Cathedral, Círculo de Bellas Artes, Prado Museum, National Archaeological Museum.