We've thought of pyramids to contain shafts, tunnels or chamber inside. But this Mexican pyramid in Chichen Itza complex in Mexico is found to have to more inner layers of pyramid inside like a Russian matryoshka dolls.
Anthropologists made an interesting discovery of piled-up pyramid within the famous ancient Mayan complex Chichen Itza in Mexico's Yucatan Peninsula.
The Kukulkan pyramid or "El Castillo" (The Castle) was known to already have a second 20-metre high pyramid within the exterior 30-metre high pyramid. Its discovery was made in the 1930's. Anthropologists and engineers said that the 2nd pyramid was built more or so around 250 years earlier than the exterior one which was probably built between 1050 and 1300.
It seemed like the newly discovered 3rd layer may had also been built 250 years earlier than the 2nd pyramid around 550 and 800. The Mayans looked like they followed a pattern of building the Kukulkan pyramid 10 meters higher every 250 years.
According to Denisse Argote, an expert at National Anthropology and History Institute, the layering of pyramids could be built due to various reasons. It could be due to the deterioration of the structure or to the arrival of a new leadership.
The discovery was made possible with tri-dimensional electric resistivity tomography or "ERT-3D".
eoffrey Braswell, anthropology professor at University of California, San Diego who is not part of the study but has conducted studies on Chichen Itza gave information that in their studies years ago they found an unstable and misaligned structure below the subsequent layers.
"To make matters more complicated," Braswell added, "the third Russian doll (layered pyramid) moving in may actually be one of a set of several small dolls rattling around inside the same shell. We just do not know. "
Last year, the scientists have discovered that the pyramid was built above a cenote or sinkhole lake, or subterranean river.