Duomo of Florence

The frescoes on the inside of the dome are impressive.  The rest of the inside is plain and unremarkable when compared to many of the other churchs in Italy.  The view from the top of the Dome and Giottos Tower just outside are probably worth the climb.  The piazza outside is always full of thousands of toursists.  You can see video of the walk up and the view from Giotto's Tower here:  Giotto's Tower Walk

Doors to the Baptistry