> http://inhabitat.com/sunken-pedestrian-bridge-in-the-netherlands-parts-moat-waters-like-moses/
> 読めないからよくわからないけど(;´Д`)なんでこんなｽﾚｽﾚに橋つくったのかな
> 雨降ったら様子見に来て流されちゃうじゃん

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

参考：2011/11/15(火)22時42分20秒