How some Southern California tunnels are still used, while others have vanished
Today, L.A. Metro’s subway tunnels connect some of the city’s most densely populated neighborhoods. There are many other ...
Archaeologists Followed a Sketch by Leonardo da Vinci. It Led to Secret Tunnels Under an Ancient Castle.
An underground tunnel network long rumored thanks to drawings by Leonardo da Vinci under Milan’s Sforza Castle are proven to ...
Popular Science26d
Da Vinci was right: Secret tunnels found in Italian castle
But according to recent, ground-penetrating radar and laser scans, da Vinci’s references to underground tunnels aren’t myths—they’re real, and some of them may have been used to secretly ...
National Geographic news6d
Rome's Ancient Catacombs
The catacombs, a network of dark and narrow underground tunnels and tombs ... 1 of 13 Archaeologists study a colossal Olmec stone head in La Venta, Mexico in this 1947 National Geographic photo.