The Idrija Mercury Mine is located in Idrija, Slovenia, and is one of the oldest mercury mines in the world. It was established in the 16th century and played a significant role in the production of mercury, which was used in various industries, including mining and medicine. The mine is recognized for its unique underground structures and rich history. In 2001, the Idrija Mercury Mine was designated a UNESCO World Heritage Site due to its cultural and historical significance. The mine features extensive tunnels and shafts, showcasing the techniques used by miners over the centuries. Today, it serves as a popular tourist attraction, offering guided tours to educate visitors about its heritage.