Tunnelsysteme, Geheimgänge, unterirdische Pestfriedhöfe, vergessene Schatzkammern - es gibt nichts, was es nicht gibt da unten. Besonders viel Skurriles findet man unter Neapel.
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Hidden deep into a mountain is an abandoned army base which was used to store ammo during World War 2. The base was built into the solid rock to protect it from air attack. The site includes tunnels, ...