Nobody says you need extra-biblical miracles to have faith (although, to be a Christian, one is required to believe that miracles occur). But God sends them anyway.
# 4: well said!
They historically found where Jesus was born, where Jesus was crucified and where Jesus was buried. Good enough for me.
I dont need my faith to be confirmed if they found the place where Jesus hung out for milkshakes and fries when he was 20 years old.