Pisa

The Leaning Tower of Pisa, here depicted by Markmuel, is actually the bell tower, or campanile, of the Pisa Cathedral. The fact that the tower began to tilt soon after its construction really sealed its public image. It's in some ways too bad that the Tower gets so much attention to the extent that the Cathedral and the Baptistry, all built in the same plaza, get very little notice. I was actually there in 1991, a year after the Tower was closed to the public for a decade of restoration work, and all three structures are amazingly beautiful.