>> 7,000. >> reporter: 7,000? should we even be standing here? >> for a few minutes it's nothing. i do it every day, almost. >> now 700. >> but here will be 7,000. you can see the difference. one meter. >> reporter: but somehow the silence here feels just as distressing. this was a school. there's a mess of gas masks tossed aside by looters who stole the metal parts, pictures of lennon line the walls and floors. you see the children's names, grades, careful penmanship. a stuffed bear still holds its flowers, a pickled pepper waits on a shelf. >> time stood still here. it hasn't moved. >> reporter: there is a monument, just don't step on the grass around it. >> the next 300 to 1,000 years