The stories of the bells are simply amazing. The shiny bell is the newest one, named Juan Diego. It hangs next to the biggest bell, named Our Lady of Guadalupe, of course.
Only a few of the bells swing--most are struck like ours. The bell below with the cross is called the "campana castigata." Sometime in the 1940s, the bell ringer did not get out the way in time and was struck by the bell and killed. The bell was "punished" and remained silent for more than fifty years. In the Great Jubilee Year 2000 the bell was "forgiven" and rung again for the first time in more than fifty years.
This is the strepitus which is sounded during the Triduum. There is also a bell which is rung only at the Easter Vigil to announce the Resurrection. SO AMAZING. And actually quite a bit easier to get to than our bells.