Sketches in Leonardo da Vinci's Codex Forster I appear to show tunnels leading from the castle. Ground-penetrating radar appears to have found them, centuries later.

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 ...

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 ...

Here’s what you’ll learn when you read this story: An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to exist.

Here’s what you’ll learn when you read this story: An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to exist.

He was himself admired as a player of the viola da braccio (an ancestor of the ... the spacious “room of the boards” in the Sforza castle was Leonardo’s largest surviving courtly decoration.

Leonardo da Vinci alluded to the existence of tunnels under an Italian ... and Sforza Castel teamed up to discover that the ancient Sforza Castle is hiding tunnels under it. Vinci was once hired to ...