Who could have built these architectural wonders if not a race of giants??

Gozo, Malta the last stronghold of the giants of Europe,,,Erich Von Daniken "The Eyes of the Sphinx",,,Ticantilla, the temple of giants built by the giantess Sunsuna,,,

Lake Titicaca,,,Bolivia,,,Aymara Indians,,,no explanations, therefore must be giants or ETs (a secret technology),,,

Bruce Rux "Architects of the Underworld",,,the architects are a race or races that built the megaliths,,,

Baalbek, Lebanon,,,1 Kings 9:17-19, [Baalath NOT Baalbek nor is Baalgad spoken of in Joshua 11:17],,,trylithon,,,built by a tribe of giants after the flood for biblical king Nimrod,,,

What is meant by "giant",,,acromegaly vs really tall people,,,Marvin Antelman (Weizman Institute of Science),,,Rabbi Itzchak Marmstein (Center for Jewish Studies, biblical references to the existence of giant being before the flood

[Heb. nephilim, meaning "violent" or "causing to fall" (Genesis 6:4). These were the violent tyrants of those days, those who fell upon others. The word may also be derived from a root signifying "wonder," and hence "monsters" or "prodigies." In Numbers 13:33 this name is given to a Canaanitish tribe, a race of large stature, "the sons of Anak." The Revised Version, in these passages, simply transliterates the original, and reads "Nephilim."

Heb. rephaim, a race of giants (Deuteronomy 3:11) who lived on the east of Jordan, from whom Og was descended. They were probably the original inhabitants of the land before the immigration of the Canaanites. (Easton's Bible Dictionary)]

Were past environmental conditions more favorable to the existence of giants??

Dr. Carl Baugh,,,optimal genetic expression,,,diminishing of the ozone layer,,,