The river locks are quite interesting, such kind of a lock has been widely used in Europe and North America before the railway was used to transport goods.法国斯特拉斯堡沃邦拦河坝
PS.
穷游APP刚刚更新了新功能:
Biu,我每次旅行都是用TA来
找攻略、规划行程、然后预定机票、
酒店。还能进行
约伴、看看
周末去哪玩儿。你也可以去试试哦！
