While you're visiting Madrid, take a trip to the Royal Palace of Madrid. It's the official residence of the Spanish Royal Family, although it's a well known fact that they don't actually live here and this is mostly for ceremonial purposes.
Opened in 1755 with approximately 3,000 rooms, the Royal Palace is one of the biggest in Europe. It's a nice walk away from Madrid's main square, Plaza Mayor, or a short distance from Opera, the metro, so you have no excuse not to include it in your Madrid itinerary.
You can appreciate the architectural beauty from outside the gates and on some church steps, or you can pay entry and go in for a tour.
If you happen to be in the city on a Wednesday or Saturday, make time in your schedule between 11am and 2pm to watch the changing of the guard. You'll want to get there early to nab a good viewing point. It's a fantastic way to experience the traditional culture of Madrid, so don't miss out!
January 2nd to March 31st
April 1st to April 30th
May 2nd to September 30th
October 1st to December 30th
Entry to Royal Palace
Royal Palace of Madrid
Comunidad de Madrid