989-16 - Eurasian beaver (Castor fiber) dam on drainage channel in Narew marshes, Podlaskie, Poland. MORE INFO: Beaver activity benefits much other wetland wildlife by helping to maintain high water levels in Poland's ancient marshes and swamp forests.
911-6916 - The turbine hall in the Fljotsdalur hydro power station, part of Karahnjukar, a massive new controversial hydro electricity project in North East Iceland, Polar Regions
911-6915 - The turbine hall in the Fljotsdalur hydro power station, part of Karahnjukar, a massive new controversial hydro electricity project in North East Iceland, Polar Regions
911-5943 - Guthega Dam supplying the water to power Guthega power station as part of the Snowy Mountains hydro scheme, New South Wales, Australia, Pacific
911-5945 - Guthega Dam supplying the water to power Guthega power station as part of the Snowy Mountains hydro scheme, New South Wales, Australia, Pacific
29-4942 - Western part of waterfall scar 120m high and 5km wide created by giant floods when Lake Missoula's ice dam was breached at end of Ice Age, Dry Falls, Grand Coulee, Washington state, United States of America, North America