Now, it is confirmed that they truly exist. A dozen secret tunnels have been discovered beneath the Sforza Castle in Milan.

An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to exist. Ground-penetrating radar and laser scanning revealed that the ...

For more information, visit the castle's website. Milan: Duomo, Scala, Sforza Castle and Last Supper Private Tour (11 reviews) ...