The contents of German soldier's World War II grave found in the Polish countryside shocked archaeologists.

The soldier was found inside the Wdecki Landscape Park, a nationally protected area in northern Poland. The park features multiple nature reserves similar to a national park in the U.S., and was established in 1993.

A press release from the park posted on Facebook says they believe the soldier died sometime in February 1945 during a fight for control of a bridge in Grzybek, Poland. The body was found near a lake in the park, and when the body was being exhumed, a surprising discovery was made.

"However, as it turned out during the exhumation, this place was hiding other secrets!" the release said.

Archaeologists working for the park found a collection of ancient ceramic pottery which they say dates back to the Neolithic period. Other items found were tools that they say date back to the Mesolithic period, as well as coins from various points of European history.

"Our hunters came across coins scattered from different eras and territories all over Europe, it looked as if someone had discarded their coin collection right here!" the park said.

About 30 coins were found in total, some of them dating all the way back to the Roman and Byzantine empires. Researchers are not completely sure how the artifacts were all grouped together, but Research in Poland, a branch of the Polish Agency for Academic Excellence, said they could have been collected by the German soldier that was being exhumed.

The items found were in excellent condition, according to Research in Poland, who said they believed the items could have been preserved by the soil.

Fernando Cervantes Jr. is a trending news reporter for USA TODAY. Reach him at [email protected] and follow him on X @fern_cerv_.