This story originally appeared in the August 2014 issue of National Geographic magazine as "The Hidden World of the Great War ... of the trenches above. A journalist visiting one of the caverns ...

I quite like playing in the mud. But I’d probably feel different if I was a soldier in the trenches during World War One. WW1 SOLDIER JACK: Mud? Oh, we know all about mud here on the Western Front.

These medieval-style weapons turned World War I trenches into battlegrounds of close combat! Emmanuel Macron has finally scored a win Is your car color one of the most popular in America?

Dan Snow:Hello, I'm Dan Snow. When we look back at World War One, the trenches are among the first things that come to mind. Those scars on the battlefield that played such a key role in the ...