Lost for decades beneath the streets of Naples, Italy, the Galleria Borbonica is a time capsule of the city's history. The system of tunnels and caverns was originally created in the 1800s as an escape route for the city's royalty. It was then abandoned until the early 1930s, when it was used as a storage facility for contraband vehicles. During World War II, it became a military hospital and bomb shelter. After the war, it was eventually sealed and forgotten until it was rediscovered in 2005. Fancy a tour?