What’s hidden beneath this church?

The church we see on this grassy hill was built after Spanish Conquistador Hernan Cortez and his army conquered Cholula, in present-day Mexico, in October 1519. The Spanish ravaged the holy city that day, murdering 10% of its population and burning down the many pyramids that dotted the area. But just underneath this church, buried for centuries, lay an ancient secret never discovered by the Spanish. It’s the largest pyramid in the world, the Great Pyramid of Cholula, so big that its enormous base would span several Olympic-sized swimming pools - four times the size of the Great Pyramid of Giza.
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