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 ...

“The underground holds (traces ... who was not involved with the recent discovery. “Whether his drawings and the tunnels ...

Atlas’s bunkers can include parking spaces, gyms and greenhouses. At this site near Dallas, an underground tunnel will connect the bunker to the client’s home. Citing fears of pandemics ...

One local urban explorer recently went inside to discover more about the underground tunnels. “A lot of times with abandoned hospitals there’s a tunnel system below it. There were rumors of ...

and the functionality of underground tunnel networks. Drawing on ventilation expertise developed in industries like mining, innovative solutions can be adapted to support the sustainable ...