ChainsawAsh said:

In the "Knightfall" arc, he lets all the Arkham inmates loose to wear Batman down. After Batman finally rounds up everyone else, Bane - having discovered that Bruce Wayne is Batman - is waiting for him when he returns to Wayne Manor. The two fight in the Batcave, ending in Bane breaking Batman's back.

In the Batcave? I haven't read most of Knightfall, but I do have the issue right after Bane breaks Batman's back, and I could have sworn it was in public. There were reporters there, and Alfred pretended to be a paramedic and rushed Batman back to the cave rather than a hospital. I remember this because there was a very memorable moment where Tim questions Alfred's decision, saying it's more important to make sure Bruce gets proper treatment, to which Alfred responds that, to Bruce, making sure that his identity of Batman is not revealed is ALL that matters, and that he'd rather die than be found out.