A bridge is a structure built to span Span is a section between two intermediate supports, e.g. of a beam or a bridge. A span can be made of a solid beam or of a rope. The first kind of span is used for bridges, the second one used for power lines, overhead telecommunication lines, some type of antennas or for aerial tramways a valley In geology, a valley or dale is a depression with predominant extent in one direction. A very deep river valley may be called a canyon or gorge, road A road is an identifiable route, way or path between places. Roads are typically smoothed, paved, or otherwise prepared to allow easy travel; though they need not be, and historically many roads were simply recognizable routes without any formal construction or maintenance, body of water A body of water or waterbody is any significant accumulation of water, usually covering the Earth or another planet. The term body of water most often refers to large accumulations of water, such as oceans, seas, and lakes, but it may also include smaller pools of water such as ponds, puddles or wetlands. Rivers, streams, canals, and other, or other physical obstacle, for the purpose of providing passage over the obstacle. Designs of bridges vary depending on the function of the bridge and the nature of the terrain where the bridge is constructed.
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