During the preparation for a sports orientation competition 50 km from Gothenburg, Sweden, cartographer Thomas Karlsson discovered about 2,500 years old Bronze Age trove, the BBC reports.
Archaeologists say the trove contains 50 different pieces of jewelry, including necklaces, bracelets, and clothespins.
"At first, I thought it was a lamp, but when I looked closely, I saw that it was old jewelry," Karlsson said.
The items were in good condition, so he thought they were copies, though he still consulted with archaeologists.
According to Swedish archaeologists, it is very rare to find such treasures in the forest. The ancient tribes mostly left offerings like this in rivers or swamps. In this case, the treasure was hidden in the woods, next to the stones. Archaeologists say these items may have been a gift to the gods.