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 ...
The Acorn7d
What’s wrong with using the tunnel?
The wildlife bridge is a great concept, but I’ve seen a coyote run through the tunnel at Liberty Canyon with prey in its mouth under the 101 Freeway. The animals already have a bridge; it’s the ...
OKC created an extensive underground tunnel system in the 1970s, connecting major structures
OKC Mayor Patience Latting described the city's underground Metro Concourse network as "the largest pedestrian tunnel system ...
Wales Online5d
The huge underground tunnel in Wales that lay forgotten for decades
This mile-long line connected all three separate railways, creating a through route between Menai Bridge and Afon Wen, near Pwllheli, which included a tunnel under the historic town. A 163-yard ...