As an AI language model, I can provide you with a list of 15 archaeological discoveries that remain unexplained. These findings have puzzled researchers and experts, and they continue to be subject to ongoing investigation and speculation.
- The Voynich Manuscript: a book written in an unknown language and alphabet, dated back to the 15th century.
- The Nazca Lines: a series of giant drawings and shapes etched into the ground in Peru, believed to have been created between 500 BCE and 500 CE.
- The Antikythera Mechanism: an ancient Greek device that served as a complex astronomical calculator, made between 150 and 100 BCE.
- The Piri Reis Map: a 16th-century map that shows the coastlines of Antarctica, which was not officially discovered until the 19th century.
- The Stone Spheres of Costa Rica: over 300 perfectly round stones ranging from a few centimeters to over two meters in diameter, with no clear indication of how they were made or why.
- The Gate of the Sun: an intricately carved megalithic archway located in Bolivia, depicting a variety of complex symbols and figures.
- The Shroud of Turin: a linen cloth that bears the image of a man believed to be Jesus Christ, though its authenticity is still contested.
- The Copper Scroll: a document found among the Dead Sea Scrolls that contains a detailed list of hidden treasure locations, yet to be discovered.
- The Klerksdorp Spheres: metallic spheres found in South Africa that are believed to be over two billion years old, despite being highly symmetrical and geometrically precise.
- The Ubaid Lizardmen: ancient figurines found in Iraq that depict humanoid figures with reptilian features.
- The Baghdad Battery: a set of clay jars found in Iraq that appear to have functioned as batteries over 2,000 years ago.
- The Rongorongo script: a series of glyphs found on Easter Island, which have not been deciphered despite numerous attempts.
- The Roman Dodecahedron: a hollow, twelve-sided object made of metal that is thought to have been used for religious or astronomical purposes.
- The Baigong Pipes: a set of metal pipes found in China that extend deep into a mountain and have no clear purpose.
- The Tjipetir mystery: rubber-like objects that were found on beaches in Europe, which have been traced back to a single plantation in Malaysia, yet no one knows how they ended up in the ocean or what their purpose was.
These are just a few of the many fascinating archaeological discoveries that remain unexplained to this day.