> > Fort de Roovere was surrounded with a shallow moat that was too deep to march across, and too shallow for boats. In turn the earthen fort had remained protected –until now.
> > はい(;´Д`)どうぞ
> おおなるほど(;´Д`)橋になっているわけではなくて水底を歩いているだけなのか

橋つくったほうが楽そうに思うんだけど(;´Д`)

参考：2011/11/15(火)22時50分09秒