In the 1930s when Chichen Itza, which dates back to the 6th…

In the 1930s when Chichen Itza, which dates back to the 6th century, was being unearthed in the 1930s they discovered a pyramid inside of it. Researchers discovered a second pyramid inside last year via some high-tech tools, found below the first one, and indicates that near the center of the structure is a ramp and an altar.