Here are some interesting sights to see in Madrid that shouldn't be missed:

• Royal Palace - the Royal Palace is used only for ceremonial purposes. When not being used for official events, the Palace with its 3000 rooms is open to the public, who will enjoy the artwork and armor and weaponry collection that date back to the 13th century.
• Royal Botanical Gardens - the gardens contain pavilions which allow for rests among the cool plant surroundings, as well as greenhouses that involve state of the art plant technology.
• Royal Theater - the Teatro Real has been classified as a historical monument. Its 1750 seats makes it one of Europe's largest opera houses as well as one of the finest.
• Almudena Cathedral - after more than 100 years of construction, the cathedral was consecrated by Pope John Paul in 1993 and unites different architectural styles and features.
• Puerta del Sol - his square, which marks the site of the eastern entrance into the city, was once the site of a gatehouse and castle and is one of today's most popular meeting points in Madrid.
• Gran Vía - the city's main road is lined with boutiques, department stores, movie theater and restaurants that attract the attention of the people walking by.
• Retiro Park - the park was constructed in 1633 by Phillip II as a place to relax and regain his strength for his demanding tasks as king.
• Plaza Mayor - Madrid’s Plaza Mayor was established in the 15th century as a market place and is nowadays the liveliest square in the city.
• Plaza de Toros - the largest bullring in the world is used for bullfights from March to October, as well as for rock and pop concerts during the summer.
• Plaza de Oriente - the attractive vehicle-less open space next to the Royal Theater and the Royal Palace offers recreation in countless cafes.
• Plaza de las Cibeles - the square's main attractions include the famous fountain, considered a true symbol of Madrid, and the postal office which resembles an impressive palace.
• Plaza Castilla - discover Madrid’s modern side with two 115-meter-high towers lean in towards each other at an angle of 15º to create the Gateway into Europe.
• Faro de Madrid - the "Lighthouse of Moncloa" is a transmission tower opposite the American Museum that was designed by Salvador Pérez Arroyo.
• Atocha Train Station - the train station was built in the late 19th century in Art Nouveau style. It contains a tropical garden where travelers can stop for a coffee break in the enjoyable green atmosphere.