"And the children of Israel went into the midst of the sea upon the dry ground: and the waters were a wall unto them on their right hand, and on their left." This eye-catching installation called the Moses Bridge lets you cross the moat of a Seventeenth Century Dutch fort beneath the water level. From a distance, it can't be seen, so people walking on it appear to be moving through the water.

Link -via My Modern Met | Official Website | Photo: RO & AD Architects