As the 90th anniversary of the end of World War I approaches, the BBC's Robert Hall has been to the battlefields of France and Belgium.
Trenches in the forest of Verdun have simply become overgrown while Fort Douaumont remains largely untouched.
Click on the map below for a tour of the sites.
Hill 62
Three generations of the Greeve family reflect on World War I and what it means to remember those who died.
Fort Douaumont
Historian Christina Holstein takes a tour of Fort Douaumont, near Verdun in France, to show the remaining gun turrets and cupolas.
Caures Wood
Despite the forest growing around them, the German trenches of 1916, are still clearly visible. Historian Christina Holstein explains the design of the trenches and details what happened in them.
Vimy Ridge
The BBC's Robert Hall joins Iain McHenry, a military historian, on a tour of the tunnels at Vimy Ridge.
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