Mayan water reservoir in Mexican rainforest: Archaeologists find huge artificial lake with ceramic-lined floor

Archaeologists from the University of Bonn have found a water reservoir the size of a soccer field, whose floor is lined with ceramic shards, in the Mexican rainforest. It seems that in combination with the limestone on top, the shards were supposed to seal the artificial lake. The system was built about 1,500 years ago. It is the first example of this design found for the Maya. It is not yet known whether the reservoir's entire floor is tiled.

Since 2009, researchers from Bonn and Mexico have been systematically uncovering and mapping the old walls of Uxul, a Mayan city. "In the process, we also came across two, about 100 m square water reservoirs," explained Iken Paap, who directs the project with Professor Dr. Nikolai Grube and the Mexican archaeologist Antonio Benavides Castillo.

Such monster pools, which are also known from other Mayan cities, are called "aguadas." Similar to present-day water towers, they served to store drinking water. But the people of Uxul seem to have thought of a particularly smart way to seal their aguada. "We conducted a trial dig in the center of one of the water reservoirs," explains Nicolaus Seefeld, a young scholar. "We found that the bottom, which is at a depth of two meters, was covered with ceramic shards -- probably from plates -- practically without any gaps. But we don't know yet whether it's like this throughout the entire aguada."

If so, that would be a minor sensation -- merely due to the quantity of ceramics required. The aguadas in Uxul were each as large as ten Olympic-size pools. Maybe there used to be even more artificial lakes. After all, the precious commodity had to be enough to last a population of at least 2,000 through the 3-month dry season.

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