ATOCHA. Located in one of the city's oldest districts, this 18th century church is Madrid's largest and remains in use. This majestic, neo-classical structure contains six chapels that are individually decorated, including one that was painted by Goya. On-site museum features significant Christian art. Multiple services daily. Metro: La Latina

CENTRO. Majestic triple-arched entrance makes this one of Madrid's definitive monuments. Established in 1611 by the wife of Felipe III, this was formerly annexed to the Royal Palace via an underground passageway. A tragic fire resulted in the interior undergoing an extensive renovation in 1767. The site of numerous artistic treasures. Metro: Ópera or Santo Domingo

CENTRO. Site features two identical chapels; the original, which houses several beautiful Goya frescos, and a copy, which was built so that services could be held without affecting the aging original. Metro: Principe Pío

CENTRO. Spectacular architecture resulted in this being considered the eighth wonder of the world. Situated in the heart of Madrid, you'll find many spectacular tapestries here, as well as a superb collection of paintings by Brueghel, Coello, Tiziano, Luini, Sebastiano del Piombo, Rubens, Sanchez, and Van Cleve. Metro: Sol or Callao

El Escorial was built following Spain's victory in San Quntin (1557). This magnificent palace, mausoleum and monastery complex took 21 years to complete. Philip II, King of Spain, was the visionary behind the project. Library houses an impressive volume of important documents, and there is also a noteworthy collection of paintings, sculpture and furniture. Restored to its former condition in 1979. 1 hour by train/bus. Metro: Trains daily from the main stations in Madrid, buses leaving every hour from Moncloa metro station. Reservations are essential for the guided tours of the Palacio and the Casita. Book at least 24 hours ahead.