Back in 2004 Patrice Endres dropped her son off at school and this was the last time he saw her. This, and five other episodes of Unsolved Mysteries, are now streaming. | Netflix

The world’s largest living organism, the Humongous Funguss, is located in Malheur National Forest in eastern Oregon. It covers over 2,200 acres and is made up of the Armillaria ostoyae funguss, also known as the honey mushroom. | Unsolved Mysteries & Paranormal Activities

The “Polish Pyramids” are a group of megalithic tombs discovered in the Kuyavian region of Poland. They are elongated mounds, reaching a length of up to 150 meters and a height of 2 to 3 meters, and are believed to date back 5,500 years to the Neolithic period, thus predating the Egyptian pyramids. | Unsolved Mysteries & Paranormal Activities