Explore ingenious engineering in Florence's Duomo

 Italy// Get yourself on the outside of some biscotti and a stiff coffee  before ascending the 463 steps into the cupola that crowns Florence's  magnificent Duomo. The going is steep, but how often do you find  yourself nose-to-nose with Renaissance frescoes the calibre of Giorgio  Vasari's Last Judgment? With each step, the marvel of Brunelleschi's  octagonal dome unfolds, the stairway squeezing between an inner  and outer dome. The reward of reaching the summit: an unforgettable  360-degree panorama of one of Europe's most beautiful cities.