Some of these odd discoveries are byproducts of natural occurrences. Others, however, may make you wonder about the fascinating backstory of how these objects landed in this neck of the woods (in the most literal sense). This series of photos continues the ones Bored Panda collected previously. Scroll away to see which ones intrigue you the most. According to the World Wildlife Fund, here’s an approximate: “We don’t know how many tree species there are on Earth, but scientists estimate there are about 63,000 known species. There could be as many as 9,000 tree species still unknown to science.” According to a report by the Miami Herald, archeologists from the University of Warsaw found traces of Yotvingian inhabitants through the style of bronze jewelry they found in a Polish forest. They eventually discovered jewelry dating back to the 10th and 12th centuries. The Hoia-Baciu has a deep history, beginning with a UFO sighting in 1968. From then on, it became a tourist attraction. However, according to Buchan’s article, these visitors suddenly experienced strange occurrences. Buchan also shared a story from her guide, Alex, who, along with his colleague Marius, experienced something out of this world. “Well, there was a man who went crazy, thinking he’d met a demon. He’d just got a massive tattoo of a demon on his chest, to ward off demons.” “He once did an extended night tour, one-on-one, with a very morbid man who talked about his obsession with death, how he enjoyed being with people as they die, watching them die.” “Every time they would stick their head out from the tent to investigate, the noise would stop,” she wrote, recalling Alex’s experiences. “The next time, he slept in a hammock to get closer to whatever was causing the sound. His visit was cut short when a bat smashed into his face.” “We point our flashlights at misshapen trees – many here grow in zig-zag patterns or in spirals, a phenomenon which has not been plausibly explained by any of the scientists who have come to investigate. What’s more, every single tree that spirals does so in a clockwise direction.” “There are around 1,800 species in Europe’s forests which are invasive and alien to the natural environment. For example, European forests have been devastated by Dutch elm disease caused by fungi introduced from Asia, and gray squirrels are outcompeting red squirrels. Globally, invasive alien species are one of the largest causes of biodiversity loss.” These “flying goats” have been a tourist attraction since the early 2000s. But while they have become a source of livelihood for locals, some believe they are being exploited and deprived of freedom. Follow Bored Panda on Google News! Follow us on Flipboard.com/@boredpanda! Please use high-res photos without watermarks Ooops! Your image is too large, maximum file size is 8 MB.