A once sunken treasure emerges in our Geo Quiz.
We're looking for a river that begins up in the Carpathian Mountains of Central Europe. It's Poland's longest river but it's quickly becoming one of Poland's shallowest rivers.
Water levels are as low as anyone can remember thanks to long running drought. Near Warsaw, the dried up riverbed has revealed some surprises: Some unexploded World War II ordnance, a few broken Jewish gravestones, and now some rare and important marble carvings.
The carvings and stonework were stolen from Polish palaces more than 350 years ago.
Can you name this Polish river that's now filled with centuries old loot?
The answer to our Geo Quiz is the Vistula River in Central Europe.
A drought has caused the river to recede near Warsaw, Poland exposing some long lost stonework and marble that was looted from Polish palaces 350 years ago. Archaeologists as well as police are keeping watch on the artifacts scattered over the river bed.