It is the huge city of Valeriana in the jungle of Mexico, in the southeastern state of Campeche.
During the years 750 to 850 AD it was at its peak with 30,000 to 50,000 inhabitants.
An archaeology student found some interesting information while he was on the internet.
Then archaeologists revealed the place using Lidar, a laser that maps under the vegetation.
They stated that it was the 2nd most densely populated Mayan city after Calamul.
It was built in 3 different places with 6764 buildings of various sizes.
It is considered that the most likely factor in its abandonment was climate change.
[Source: http://www.skai.gr]
