The military aeronautical base of Vigna di Valle has recently been selected by the World Meteorological Organization (WMO) as the international experimentation centre for the study of rain.

Vigna di Valle is situated 30 km out of northern Rome and is 5 km from the mediaeval town of Bracciano. The base will be used to conduct the first open air experiments on the intensity of rainfall using 24 of the most technologically advanced rain gauges.