Megalith sites have been found around the world.
Baalbek in Lebanon has some of the heaviest stones ever moved by humans.
The megalith stones were already there when later civilizations built on top of them
Megalith blocks are found in Greece, Russia, South America, Central America, Egypt, Iran, etc.
Every quarry site where megalith blocks were being worked appeared to have suddenly abruptly stopped working. Stones remaining only partially cut.
I'm going to point out the structures at Giza. The Pyramids and Sphinx in particular. The area around the sphinx and the sphinx itself have signs of vertical weathering consistent with heavy rain meaning they had existed when Egypt had a much rainier climate about 12,500 years ago at least. Also the structures underneath the Pyramids are much older.
Also shit like the the age of the Universe and half life of Uranium are coded into the geometry of the pyramids and they are at the center of land mass at least as far as Africa, and Eurasia are concerned. Without a doubt the pyramids were a major architectural achievement but the weren't built by the Egyptians. They are much older. The Egyptians inherited them.
Beneath the pyramids there are even older structures that people really don't talk about. The Labyrinth under the Giza complex was described by Greek historians who had visited them.
Interestingly the Greek myth about Daedalus describes a massive labyrinth that he designed for King Minos. There are old coins from the Ruins at Knossos Crete which have a labyrinth on them.
The pyramids in Mexico were not build by the Aztecs they were build by a much older civilization. There numerous abandon cities in South America all very old. There are Megalith sites in Russia that are extremely old.
What's funny with megalith sites is there are stones that weigh as much as 1200 tons. Modern machinery can move something about half that size and it's a big deal for us to move something like this.
Older sites like Petra, Jordan have machine tool markings in the unfinished excavations. The civilizations who had the carving done are not the people who originally did the excavating. They were made expediently and with machines.
There are some similarities between megalith sites. Metal clamping techniques, cutting techniques, etc.
Polygonal constructions are found in places like Greece and Peru. Square blocks (Cyclopean construction) is found all over the place.
There's a point to this. There was a vast civilization that spanned most of the globe at some point but collapsed. Most people alive on the earth today are survivors of those civilizations. They had advanced technology and were not primitive as you have been told. Mainstream academia is involved in a conspiracy to cover this up.