Valeira Lock, 1976; Douro River; 1109 foot water level change; navigable, engineering feat, riverboat entering, Europe; Portugal; spring, horizontal

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Size: 4543px × 3000px
Location: Douro River, Portugal, Valeira Lock
Photo credit: © Sally Weigand / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: 1109, 1976, change, douro, engineering, entering, europe, feat, foot, horizontal, level, lock, navigable, portugal, river, riverboat, spring, valeira, water