Top 7 Most Expensive Pieces of Cargo Lost Forever

The Train of Walbrzych

This is the infamous Nazi gold train. It was rumored to have about 300 tons of gold, jewelry, art, and other expensive things on it, but it never arrived at its destination. In fact, we have no idea where it went missing or if it even existed in the first place. If we assume that it did exist and had 300 tons of gold on it, however, its modern-day value would be just shy of 20 billion dollars.