Chichien Itza, Yucatan 1987
El Castillo, Chichén Itzá, Yucatán 1987
...El Castillo, was built on a line drawn between the Cenote of Sacrifice and the Cenote Xtoloc. More recently Guillermo De Anda has shown that there are two other cenotes on an east-west line so the Castillo falls at the center of the cosmograms… James E. Brady
Experts have discovered that the main pyramid at Mexico’s Mayan ruins of Chichén Itzá was at least partially built atop a subterranean river.
Mexico’s National Autonomous University scientists say they found a subterranean cavity about 20 metres deep below the pyramid of Kukulkan, also known as El Castillo.
Geophysics expert Rene Chavez said on Thursday that the underground river chamber is naturally covered by rock. Such underground rivers often connect the open cenotes, or sinkhole lakes, that dot Mexico’s Yucatán peninsula.
Associated Press 8/13/15