Looking for a name fo action movie with two dudes American and Russian ones

I need you to find a movie for my friend who briefly remembers it himself. The plot goes something like this: There are two people American and Russian going to a place that is so remote that’s not on the map. The Russian dies in an accident. (something with an elevator) The American dude spent 7 years somewhere, and when he eventually returned home his property was not his anymore, due to the fact he was lost for so long.