Secret passages, also commonly referred to as hidden passages or secret tunnels, are hidden routes used for stealthy travel, escape, or movement of people and goods. They are sometimes inside buildings leading to secret rooms.
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There are thousands of caves and tunnels in Italy, giving the traveler lots of options to go underground. Tuscany alone has 1,500 grottoes and 270 km of underground tunnels. Here are three of my favorite underground (one is semi-underground) spots, and only one requires a hard hat!
Believe it or not, under the town of Orvieto is an elaborate maze of tunnels and caverns. Over 2,500 years ago, the Etruscan civilization dug deep into the earth to supply their town with water.
The Apennine Base Tunnel, alternatively known as the Grand Apennine Tunnel, is a railway base tunnel 18.507 kilometres (11.500 mi) long on the Bologna-Florence Direttissima line in central Italy.
In 1876, then minister of public works Giuseppe Zanardelli declared: “Above or below the waves, Sicily must be united to the Continent.” But the tunnel was deemed too expensive and complex, and instead efforts were put into starting a ferry service, which began in 1896.