Laurie Rimon was taking a break from her hike in Israel near Jerusalem when she stumbled upon a rare Roman coin. But Rimon didn't realize the coin was 2,000 years old until she handed the coin to authorities, who immediately recognized its value.

The Trajan minted coin is so rare that there is only one other from the same collection, as Dr. Donald Ariel, head curator of the Coin department at the Israel Antiquities Authority, explains in the video above.

Watch to learn more about this unique coin.