Santa hat
Falkirk Wheel Boat Lift
Rideau Canal
PANAMA CANAL
Atlantic Road Norway
Bhumipol bridge
Octavio Frias de Oliveria Bridge Sao paulo Brazil
FortGibson7-2000_Dam
Cordell Hull lock and dam
Lock and Dam closeup starved rock
Benjamin Sheares Bridge
Three Georges Dam construction
Mississippi_River_Lock_and_Dam_number_15
Klamath Dam, Omaha NE
Inguri Dam, Georgia
Grand Coulee Dam
Geoeye-1-hoover-dam
Mehrangarh Fort
Hydroelectric power dam
Weir, Vermont
Hagesteijni movable weir