Somehow, the Ark escaped the Babylonians and ended up in Tanis, Egypt, where it was discovered by Indiana Jones before being swiped by a some Nazis and a French archaeologist named Belloq. Eventually, it ended up in an American government warehouse, after being examined by some top men ... *top* men.
Or so I'm told.
the Holy of Holies in the Second Temple was empty.
2) Where is it? If you believe God:
Rev_11:19 Then, in heaven, the Temple of God was opened and the Ark of His covenant could be seen inside the Temple. Lightning flashed, thunder crashed and roared, and there was an earthquake and a terrible hailstorm.