They have long been the subject of legends and speculation. Now it is known that they truly exist. Under the Sforza Castle in ...

A series of underground passages have been found under Sforza Castle in Milan by experts at the city's Polytechnic University ...

A sprawling network of secret underground tunnels is being transformed into a major new London tourist attraction. Hidden 40m ...

In their study, the researchers used a combination of ground-penetrating radar and laser scanning to build up an accurate map of the ... can be linked to secret military tunnels that can also ...

A sprawling network of secret underground tunnels is being transformed into a major new London tourist attraction. Hidden 40m below the streets of the capital, the Kingsway Exchange Tunnels were ...