Babylon of old, was a empire of the Chadians ( I think that word fits ) , or Babylonaionas . It was located in Iraq of today, and its old city ; still remains to this day.Saddam Hussein , while he was in power, even restored a large part of it.
The Babylon of the future, will be all the world. Not one location. It is representative, of all confusion, at the last days, when Satan ( the king of Babylon, of who Nebuchadnezzar was a type of ) is here playing false Christ, and all the world whores after him ; that ashamedly includes Christians.
That is why she's called the harlot , she was meant to be Christ's bride , instead she fell off to idolatry to a fake. It's fake religion, with Satan as its Savior .. That whole sorry affair that will take place, as Christ taught, will happen in the not too distance future, and all the worlds Christians will fall into that apostasy who have not bothered to study God's words...