In the second aria after you get to germany, one of the guards takes a battery from an elevetor and you have to track him down to get the battery in order for the elevator to work. The room where the elevator is located has two stories. On the bottom floor there are three doors. one of those doors leads to a closet. Inside the closet there is a shovel and a crate. If you break open the crate you will find the lost Ark of the Covenant from the movie "Raders of the Lost Ark". (the game and the movie both take place at about the same time period). one of the designers must have been an Indiana Jones fan!