The ancient city of Tiahuanaco, located in the high Andes of Bolivia, is famous for its mysterious ruins and structures that have baffled archaeologists and historians for centuries. One of the most enigmatic discoveries made in Tiahuanaco is an underground pyramid that was first excavated in the early 2000s. The pyramid, which is believed to date back to the pre-Inca era, has raised many questions about the history and culture of the region, and has sparked a great deal of interest and speculation among scholars and the general public alike.

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