 Today a very active group of local residents is slowly restoring the stone façades in an effort to restore the city to its medieval form.The Acqua di Fiuggi ("Fiuggi's Water") source runs through ancient volcanic deposits in the Ernici mountains which has an ecosystem that has historically been unaltered by humans.In Europe it is classified as an Oligomineral water, and has been proven to contain certain components of the "humic substance" group which, it is claimed, gives the water its health benefits.