Amateur historians Piotr Koper and Andreas Richter, along with a team of around 35 volunteers, have begun work to excavate a legendary treasure train thought to be hidden by German Nazi troops in an underground tunnel in southwestern Poland.

According to a legend, the train disappeared into a mountain tunnel between Wroclaw and Walbrzych as the Germans fled the area at the end of World War II. Geologists have doubted the claim, but some Polish officials have supported the treasure-hunting duo.

After announcing their discovery of the train last year using radar, Koper and Richter have now said they'll focus the excavation on three spots. Digging to a depth of 6 meters (20 feet), they hope to uncover the buried treasure in a few days. The dig is being streamed online.

We'll have to wait until the end of the week to find out whether Koper and Richter are right. Until then, take a look through our gallery of other legendary lost treasures - they might inspire you to go on a quest of your own.

cmk/kbm (AP, dpa)