すべてのコレクション
Wind generator
Wind generator. The electrical engineer prepares the equipment for operation. Wind farm maintenance personnel are ready to work at the site.
Hydroelectric dam with flowing water through gate, aerial view from drone
A dam on a river. A stone dam on the river, 70 meters high, creates a reservoir. Areacation, recreational area, engineering structure.
Medieval Fortress Towers, Church, and Bridges in Burgundy, Drone
Aerial Drone View of Medieval City in Burgundy, France. View of Burgundian Medieval Architecture