I have seen many videos and pictures of ancient monuments and stone blocks that have been cut, worked, drilled, and moved by technology that surpasses much of what we have today. It is obvious that at one point in time there was a world wide civilization that extensively worked in stone with advanced technology, as evidence of it is found all over the world. Same tools, same way of cutting and working the stones, same type of walls and construction methods. Weight was not a problem, nor cutting or polished the very hard stone like granite. The video below is a very interesting presentation focusing mostly on cut marks left by those tools, and what kind of technological instrument might have made them. Also have a look at my article of The Serapeum of Saqqara, Atlantean Technological Devices?
The following video is a short summary of the results of the expeditions made by the Laboratory of Alternative History group by Andrey Sklyarov, who is a member of the LAH group in Moscow, Russia. His group of scientists, mathematicians, physicists and historians travels around the world in search of traces left by an advanced ancient civilization. They have traveled to many countries including Egypt, Peru, Bolivia, Mexico, and Greece, among many others. Here he talks about and shows photos of some of his most interesting finds which prove the existence of an advanced civilization on Earth in ancient times, most notably in Egypt, Peru and Bolivia. Some of the evidence discussed here details the use of advanced machining methods used in construction and the fabrication of various ancient objects.