The Duomo is the dominating symbol of Florence. Its dramatic dome designed by Filippo Brunelleschi towers over the city like a fat and lazy watchdog. Arnolfo di Cambio started building the cathedral at the end of the 13th century, and the dome was added to the structure in the 15th century. The climb up the 463 steps to the top of the cupola can be a bit claustrophobic at times, not to mention exhausting, but the magnificent view is worth the effort. If that sounds too demanding, you can also just visit the cathedral free of charge.

The Accademia on Piazza Signoria was the first art academy for painters in Europe. Nowadays, it's an impressive museum with Michelangelo's David and his, er, manhood as its biggest treasure. The Hall of Prisoners is a fascinating collection of unfinished sculptures, demonstrating Michelangelo's precise carving skills.