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saudi arabia bir hima petroglyphs ( I did not take this particular photo, but petroglyphs are everywhere!)
Petroglyphs found on cave and mountain walls in many parts of the world, imply that ancient aliens may have visited the planet.
Göbekli Tepe Turkish: [ɡøbe̞kli te̞pɛ] ("Potbelly Hill") is a Neolithic hilltop sanctuary erected at the top of a mountain ridge in the Southeastern Anatolia Region of Turkey, some 15 kilometers (9 mi) northeast of the town of Şanlıurfa (formerly Urfa / Edessa). It is the oldest known human-made religious structure
Neolithic Quern Stone - Quern-stones are stone tools for hand grinding a wide variety of materials. They were used in pairs. The lower, stationary, stone is called a quern, while the upper, mobile, stone is called a handstone. They were first used in the Neolithic to grind cereals into flour
Loki stone, Kirkby Stephen church by abridgeover. The 8th century Loki Stone is small and is decorated by a carved figure, chained, with horns. It is one of the few physical survivals from the time when the Vikings had settled in this area. It's thought to be part of a larger cross.
Porfirio Díaz standing next to the Aztec Sun Stone. The Aztec calendar stone, Mexica sun stone, Stone of the Sun (Spanish: Piedra del Sol), or Stone of the Five Eras, is a large monolithic sculpture that was excavated in the Zócalo, the main square of Mexico City, on December 17, 1790. It was discovered while Mexico City Cathedral was being repaired. The stone is approximately 12 feet across and weighs approximately 24 tons.