LOS ANGELES, Jan. 15, 2021 /PRNewswire/ — History was made in 2007, as the History Channel premiered their first ever full-length documentary, diving into the hidden secrets of Naples via Naples Underground (Napoli Sotterranea) founded and run by lead Speleologist Enzo Albertini. The program, titled «The Secret Cities» begins at a depth of 6 metres, in […]
