The Bourbon Tunnel

If you’re looking to scratch that spooky, underground itch without getting caught up in hordes of tourists, head to the Bourbon Tunnel. Originally built as a secret escape route for the city’s royal family in 1853, it connects the Royal Palace to the Villa Vittoria. After being used as an air-raid shelter during World War II, the tunnel became a dumping ground for all sorts of unwanted debris, from fascist statues to lines of vintage cars and scooters, untouched since the 1970s. Atmospheric and fascinating in equal measure, a guided tour is a must. Recommended by local insider Matt Barker