#Napoli #Sotterranea reflects 2,300 years of history. About 40 m beneath the surface, greek colonists started to excavate Yellow Tuff around 470 BC and the remaining cavities were turned into #rainwater #cisterns. t.co/wZx8mFtjau
The #Romans greatly expanded the cavities and developed them into a complex #infrastructure and #aqueduct system. #Yellow #Tuff became most used building stone in Neapolitan architecture. The underground water aqueduct was in use until a severe cholera epidemic in 1884… t.co/HPIx03m6pX
Nowadays, the underground network of #Napoli #Sotterranea and the entire cavern system beneath Naples extends across around 450 km of tunnels, cisterns, and quarries. In 2nd world war those tunnels served as critical bomb shelters… t.co/KFLugxGJiT
