In the Netherlands built an “invisible” bridge
Architectural Bureau RO&AD from Holland Designed a unique bridge, which was awarded the title of “Best structure of 2011”. The bridge was built during the reconstruction of the Dutch Fort de Roovere. The building is part of the 1628 coastline, through which several towns and villages were connected by sand and stone ramparts. If necessary for defense, for example, during wars, with the help of these ramparts, the territory was flooded with water. The building was destroyed in the XIX century and was recently restored as a monument and as a tourist site. “It is unwise to build a bridge over the ramparts, especially if it extends from where the enemy comes. So we made it invisible, the architects joke.
From a distance, the bridge is invisible. You can see only the heads of visitors sticking out of the water. And only when you get closer, you can see a narrow moat. Like Moses, who divided the waters of the Red Sea, you can pass through the water. The question is, how does the bridge stay dry in the rain? To do this, additional shafts were built on both sides of the ditch, which drain excess water. So the water level in the moat constantly remains unchanged, according to the German magazine Baunetz.
Source: http://www.votpusk.ru/news.asp?msg=395517