Two months ago, headlines were made around the world as treasure hunters identified a legendary Nazi train packed with weapons, gold, money, and archives hidden in a long-forgotten tunnel in the Polish mountains. It is believed that the train may also contain the long-lost Amber Room of Charlottenburg Palace, an early 1700s room crafted from amber, gold, and precious jewels, estimated to now be worth $385 million. This week, engineers will begin surveying the site to determine how the possibly booby-trapped armoured train can be retrieved.