The Collection of Waters is a complex rain and spring water collection system, located in Matera, in Basilicata.
It is believed that this system has been fundamental for the survival of the population of Matera from prehistoric times to the present day.
In 1993, the Collection of Waters was recognized as a World Heritage Site by UNESCO.
The system consisted of cisterns dug into the rock, connected to each other by a system of communicating vessels.
The walls of the cisterns were covered with a material called cocciopesto, obtained from the processing of terracotta shards, in order to waterproof them.
The level of the water present in the cisterns can still be seen imprinted in the cocciopesto today, representing a historical testimony of great value.