Snake head on Aztec platform, Mexico City
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Aztec ceremonial platform unearthed in Mexico City

Archaeologists in Mexico City have uncovered a round Aztec platform which they believe may have been used for religious rituals and as a burial place for emperors.

The 15m-wide structure dates back more than 500 years and is surrounded by 19 stone snake heads.

Liliet Heredero reports.

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