The concept of out-of-place artifacts (OOPArts) refers to ancient objects found in locations where they shouldn't exist, challenging our understanding of history and sparking countless speculations. For instance, in 1844, a nail embedded in rock was discovered by Bruce in a quarry in England, leaving many puzzled. This nail, although rusted, retained its shape and dated back far beyond the technological capabilities of the time. In 1852, another nail, about 5 centimeters long, was found embedded in quartzite in a village in the northeastern United States, further adding to the mystery. In 1891, a lock was discovered hidden within a coal block by a woman in Illinois, which only deepened the intrigue. The Salzburg Cube, one of the most famous cases of OOPArts, has sparked widespread discussion. Weighing approximately 785 grams and featuring deep grooves on its surface, it was initially thought to be a meteorite. However, after numerous investigations and analyses, it was ultimately confirmed to be a cast iron product. The latest OOPArt was discovered in 1961 in Orland, California, known as the 'Koso artifact.' This item, suspected to be a modern igniter part, is believed to be at least 500,000 years old and remains shrouded in mystery. These bizarre discoveries not only challenge our perceptions of history but also ignite boundless imagination about the unknown world.