A Baroque Revival palace that once housed the central post office and the city’s telecommunications agency, the Palacio de Cibeles became Madrid’s City Hall in 2007. Even the city councilors didn’t need something quite this huge, so much of the building was recently converted to a series of galleries, a concert hall, and other public spaces called CentroCentro. A reading area has daily papers and free PCs with Internet access. You’ll also find lockers, coat check, public restrooms, an excellent store selling Madrid-oriented books and gifts, and a tourist information area. If you’re hungry, there’s a casual cafeteria and a restaurant for a more leisurely meal. The Mirador Madrid is perhaps the grandest delight of the whole complex. An elevator whisks you to the seventh floor, where you can walk around on the open-air balcony for one of the best bird’s-eye views of the city, especially the Cibeles fountain.