Beneath the bustling medieval streets lies a silent, shadowy labyrinth.

Carved into the volcanic tuff rock, these tunnels date back to the Etruscans but were expanded in the Middle Ages as secret escape routes for noble families.

During WWII, they served as life-saving bomb shelters for the population. Walking through these cool, dimly lit passages offers a hauntingly beautiful perspective on how the city survived wars and sieges through the centuries.

Not recommended for those with severe claustrophobia. The temperature underground is a constant 14°C (57°F), so bring a light jacket!

Photo by Mariapia Statile/via Wikimedia Commons/CC BY-SA 4.0]