I thought I knew about anomalies and archaeological sites but what I saw last night on the History channel floored me.
Located near Tiauanco, which is mysterious enough in itself, is a site know as Puma Punku. The stones weigh up to 400 tons and are cut with precision that is far beyond the capabilities of the Geico Caveman.
Capabilities of ancient civilizations are consistently underestimated. Early man had pretty much the same size brain that we do.
Again, another civilization that built monolithic structures that show a total disregard for gravity.

Total disregard for gravity? Is the thing floating? If they support the stuff up high with stuff on the ground, they have a regard for gravity. It's fine to be impressed with their ingenuity but I think disregard for gravity is a bit overboard.
The site lays in ruins so it's anyone's guess how old it is. 15,000 years not being unreasonable.
Uhh...no. On many levels.
1. It's not "anyone's guess" how old it is. Archaeologists have precise, proven, physics and biology based techniques for determining the age of ancient sites. Sure anyone can offer a guess, but they do not all have equal validity.
2. 15,000 years is very unreasonable. We've found very little evidence of humans present in South America 15,000 years ago, indicating that if there, they were just arriving. And the earliest signs of agriculture- necessary for city building- are between 6000-7000 BCE or 8-9000 years ago.
3. Modern dating has determined the site's peak was between 500 and 1000 CE. So it is less than 2000 years old.
A lot of the conspiracy stuff about this site comes from a couple of early mistakes. The first person to "study" the site was a writer and a crank to boot. The next guy was a researcher but held to some strange and radical theories that were ultimately dismissed as false after they were shown to be inconsistent with data.
From the
website of the actual excavation:
In the late 1960s, writer Erich von Daniken concluded from his "research" that aliens set up a base at Tiwanaku and erected the great monuments using their extraterrestrial technology. He used as evidence a bizarre biblical interpretation that the prophet Ezekiel had been abducted by these same cosmic beings.
Fortunately, scientific investigations over the course of this century have corrected these misconceptions and left us with a deeper understanding of the complexity of Tiwanaku and the cultural history of the Titicaca Basin. Arthur Posnansky is one of the more important figures in Tiwanaku studies, producing one of the most detailed studies of the ruins after decades of investigations. Unfortunately, his theories of hyper-diffusion, exaggerated age for the site (10,000 B.C.), and radical ideas of race tainted an otherwise incredible career.
More info