"Most people head to this ex-art school to ogle the world’s most famous nude statue. Michelangelo’s David was carved from a single five-meter-high block of milky-white marble in 1504 and originally stood in Piazza della Signoria. Don’t neglect the other artworks in the gallery, however. They include Michelangelo’s four unfinished Slaves, straining to escape their stone prison, and a fabulous collection of early musical instruments. To avoid endless lines, advance booking is advised."