Falkirk Wheel Boat Lift300Falkirk Wheel Boat LiftRideau Canal300Rideau CanalPANAMA CANAL300PANAMA CANALAtlantic Road Norway300Atlantic Road NorwayBhumipol bridge300Bhumipol bridgeOctavio Frias de Oliveria Bridge Sao paulo Brazil300Octavio Frias de Oliveria Bridge Sao paulo BrazilFortGibson7-2000_Dam300FortGibson7-2000_DamCordell Hull lock and dam300Cordell Hull lock and damLock and Dam closeup starved rock300Lock and Dam closeup starved rockBenjamin Sheares Bridge300Benjamin Sheares BridgeThree Georges Dam construction300Three Georges Dam constructionMississippi_River_Lock_and_Dam_number_15300Mississippi_River_Lock_and_Dam_number_15Klamath Dam, Omaha NE300Klamath Dam, Omaha NEInguri Dam, Georgia300Inguri Dam, GeorgiaGrand Coulee Dam300Grand Coulee DamGeoeye-1-hoover-dam300Geoeye-1-hoover-damMehrangarh Fort300Mehrangarh FortHydroelectric power dam289Hydroelectric power damWeir, Vermont300Weir, VermontHagesteijni movable weir300Hagesteijni movable weir