=== by Bob Sutherland ===
Photographs taken of World War 1 trenches in a memorial park.
On a wide desktop computer screen you may want to zoom these photographs down to 40% or 50% to have them fit side by side rather than one above the other.
Zoom photos: 40% 50% 60% 70% 80% 90% 100% 120% 140% 160% 180% 200% of screen width.
My best guess based on some research is that the above two pictures of preserved First World War trenches were taken in the memorial park that surrounds the Vimy monument.