Don't think i've ever seen this covered but...
How come when Indy and Marion escape the well of souls through a clear stone wall, did no one before hand say...hello....we're digging and looking here for the ark, but what in the fucquington it that clear stone wall doing over there and NO ONE cared to knock it down and have a look thereby finding the back door to the well of souls? Always bugged me becoz it's glaringly obvious when they emerge from it! I call Bollocks on this part....major plot hole!
I've had my 15 minutes,now what!