World's Strangest Bridges
Courtesy of Product Insider
Sunken Bridge: Halsteren, Netherlands
Building a bridge over troubled waters makes sense. Building a bridge through the very waters you are trying to avoid is just plain crazy. Ro Koster and Ad Kil Architects constructed a remarkable sunken bridge in Halsteren to cross the defensive moat at Fort de Roovere, built in the 1700s to protect the Netherlands from invasion by France and Spain.