Plaza Mayor marks the historic heart of Madrid, Spain, one of the world's truly spectacular cities. Lined with shops and restaurants, overflowing with the near-round-the-clock energy of Madrileños and tourists alike, the site of celebration and horror throughout its history, this infamous city square has been a personal favorite place for what is now most of my life. The Plaza celebrates its 400th anniversary this year, opening up the festivities on February 17 with the most incredible light show spectacle we have ever seen. Though the show itself has passed, the anniversary celebrations are ongoing throughout the year. Whether now or in the future, we recommend that Plaza Mayor and Madrid in general be at the top of your travel list.