The mystery of the Inca pyramid

In 1976, while taking aerial photography of the Amazon Basin, the Brazilian Air Force claimed to have discovered three strange pyramid-shaped peaks. Who knew that, like the penholder or the saddle shape, the pyramid is also one of the most basic shapes of mountain peaks, so why is it so surprising?

Of course, if the three peaks in the Amazon jungle are indeed artificial pyramids, that would be another matter. It is said that the tallest one is 200 meters tall, which is one-third higher than the tallest existing pyramid in Egypt. Archaeologists believe that an Indian tribe called Mogulara lived in these jungles 12,000 to 15,000 years ago. Some cultural relics such as stone tools and pottery excavated today, as well as some inhabited caves in the primeval forest, provide positive evidence for this.