Media playback is unsupported on your device

Mexico's famous Pyramid of the Sun 'at risk of sinking'

10 April 2014 Last updated at 20:05 BST

A team of researchers in Mexico has warned that one of the country's top tourist attractions - the Pyramid of the Sun - could be slowly sinking into the ground.

Thought to be a fertility symbol built around 80 AD, the pyramid - which lies about 50 kms (31 miles) north of Mexico City - was once at the heart of the pre-Columbian Mesoamerican city of Teotihuacan.

Karenina Velandia reports.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.