It is located in the southern part of the town and was used to impound the waters of a spring that begins at the top of the hill where Laguardia sits.

It was built 2,100 years ago. It allowed to accumulate about 300,000 liters of water, and it is the largest pond of the Iron Age found so far, in Europe. It has an Interpretation Center that helps to understand the history of Laguardia, the importance of the reservoir and the lives of the people who used it.

To visit contact the tourist office.