Cold winter stream cascading under a bridge in Raisio, Finland.

Cascade Under Bridge

Aerial view of energy-generating lock and dam in Alma, WI on the Mississippi River.

Aerial View of Lock and Dam on Mississippi River

Symmetrical view of a water lock with industrial railings in an urban setting.

A tranquil scenic view of a rural dam with cascading water and stone walls under a clear blue sky.

A cargo ship navigates the Elbe River in Geesthacht, Schleswig-Holstein, Germany on a clear day.