English: Satellite image of the Usoi natural dam, the tallest dam in the world, holding back the larger Lake Sarez and the smaller Lake Shadau from a screenshot from Nasa WorldWind software
This image is in the public domain because it is a screenshot from
NASA’s globe software
World Wind using a public domain layer, such as Blue Marble, MODIS, Landsat, SRTM, USGS or GLOBE.