A number of discoveries in the field of archeology have succeeded in making archaeologists scratch their heads because their origins are still unknown until now.
The Longyou Cave, discovered in Zhejiang, China, in 1992, consists of 24 man-made caves whose creators are unknown, although it is thought that this cave was made in the Qin Dynasty in 212 BC.
Speculation about who made the Great Pyramid of Giza, and the involvement of alien technology in it, continues to this day and is routinely researched scientifically, but the full history of the creation of this building remains unknown.
The L'Anse Aux prairie, which was discovered in 1960 in Newfoundland, Canada, is often referred to as Vinland (land of paradise and wine), a mysterious place of Viking belief.
Stonehenge is estimated to be 5,000 years old, but until now it is still unknown who made it, and how to arrange a number of these giant stones.
Gobekli Tepe is one of the oldest archaeological sites in the world with an age of 11,000 years. Located in Turkey, the actual shape of the site which has 200 pillars is still unknown.
The Voynich Manuscript is a book that was discovered in 1912. Because it was written using a collection of pictures, diagrams, and unknown language, it is still a mystery what the purpose of this Voynich manuscript is.
The Yonaguni Monument which is under the sea of Japan is still a mystery because until now it is not known whether this stone carving was made by humans as evidence of Atlantis or formed naturally.
Costa Rica's more than 300 giant stone balls are shrouded in a number of myths, ranging from their association with Atlantis to their true form, which is a cannonball created by God.
The Erdstall Tunnel is spread between Turkey and Scotland, this tunnel which is estimated to be 12,000 years old still leaves archaeologists confused about its origin.
The Nazca lines in the Peruvian desert have hundreds of different shapes, which are a must-see from the air. Confusingly, the Indians at that time did not have the technology to fly.
In 1986, archaeologists found the claws of an ancient bird called the Moa that were quite intact. Interestingly, the species became extinct in the 1400s due to poaching.
Easter Island or Easter Island stores a collection of stone statues called Moai which were carved around 1300 to 1500 which until now the purpose and method of making these statues are still unknown.
Saksaywaman is a kind of fort in Cusco, Peru made by piling stones without a mixture of cement. This also raises its own mystery for archaeologists.
The Sun Gate in Bolivia was made by the Tiwanaku tribe about 1500 years ago, but it is not known how they carved the stone until it was speculated for its astronomical or religious purpose.
In 2013, scientists in Israel discovered a large rock structure under the Sea of Galilee. The monument is made of many giant stones, stacked on top of each other with a weight of 60 thousand tons and a height of 10 meters. It is not known what it was used for in the past.
