Once only indicated through a sketch by Leonardo da Vinci from around 1495, concealed passageways have been discovered underneath the Sforza Castle in Milan, Italy.

A team at the Polytechnic University of Milan uncovered secret tunnels beneath Sforza Castle, potentially linked to Leonardo da Vinci's designs.

Scientists have finally uncovered hidden network of tunnels beneath a medieval castle, which were originally sketched by Leonardo da Vinci.The discovery was made during a project to digitize the underground structures of the 15th-century

Researchers may have found the hidden tunnels beneath a castle in Milan that Leonardo da Vinci sketched in 1495.

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

Once only indicated through a sketch by Leonardo da Vinci from around 1495, concealed passageways have been discovered underneath the Sforza Castle in Milan, Italy.