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Sluice complex with water filled reservoir and sluice complex in Passau (Kachlet) at the Danube River.
Miralflores locks at the Panama Canal.
Panama Canal, Panama - July 24, 2023: Doors close between 2nd and 3rd chambers going Atlantic. Blue cloudscape. Workers, rails, buildings, towers, lights and more on quays
St Catherine's Lock near Guildford Surrey England Europe
Monumental lock complex - Sluice Eefde, at the Twentekanaal near the Dutch town of Eefde.
Regensburg, Germany - August 19, 2020: A container ship just going through a river lock in Regensburg.
Devizes Caen Locks multiple lock gates Kennet and Avon canal Wiltshire England UK
A lock on a canal diverting water from the natural flow of the Mississippi River to the east  to overcome the annual variances in water depth on the river in order to maintain the shipping trade in the central United States.  This aerial view is just outside of St. Louis, Missouri on the Illinois side of the river.
Close up of a door lock bolt
Grand Union Canal at Hatton Locks Warwickshire England UK. It is a sunny summer day and the canal is still. Summer colours line the bank. There are no recognisable people in the picture.
Panama City: Miralflores locks at the Panama Canal.
Sunny Spring day in Surrey St Catherine's Lock famous place near Guildford England
Ships entering Gatun Locks from the Atlantic in the Panama Canal. Ship on right is Panamax bulk vessel and carries grain, ship on left is a cruise ship.
Formigliana, Piedmont, Italy - May 31, 2024: The Cavour Canal, from which the canals and engineering works irrigating the rice fields originate.
Sluice near Danube River.
Long exposure of a lock on the River Cam at Cambridge.
Lock of the Lot
May 19th. 2024. Stratford Canal Nr. Stratford upon Avon England UK. View from the towpath. Autumn. View of lock gates view from the towpath.
Colon, Panama - 23 January 2024: Close up view of one of the heavy steel gates at the Agua Clara locks on the Panama Canal opening to allow a ship to enter
Sandford Lock, on the River Chelmer, near Chelmsford, Essex, UK
Canal lock, closed lock door, taken on a sunny summers day
Pedro Miguel locks on the Panama canal.
Aerial from the Houtrib sluices at Enkhuizen in the Netherlands
Close up of a door hinge
October 30th. 2023. Grand Union Canal at Hatton Locks Warwickshire England UK. It is a sunny day and the canal is still. Summer colours line the bank. There are narrow boat barges on the canal.
Shooting of Vandenesse en auxois in the south-west of the Côte d'Or, at the foot of Châteauneuf and its fortifications, and near Arnay le Duc, and 35 km from Beaune at zoom 18/135, 200 iso, f 9, 1/160 second
Canal lock, on Lee Navigation at Waltham Abbey. June 2024
Seend Top Lock on the Kennet and Avon canal near Melksham in Wiltshire, South West England UK
The steep canal system of locks on the Kennet and Avon canal at Caen Hill in Wiltshire, UK
Free Images: "bestof:Horin Lock Vltava Lateral Canal CZ 475.jpg Zdymadlo Hořín na Laterálním plavebním kanále Mělník - Vraňany poblíž Mělníka Hořín Lock on Vltava"
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Eastern-lock-of-the-Chesapeake-and-Delaware-Canal.jpg
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Camden-Lock-in-London.jpg
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Mallard_Picking_a_Blackberry.jpg
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BSicon uFGATEr.svg
US timeline. Heroin deaths.svg
Short-term effects of heroin.svg
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BSicon uexLOCKSd.svg
BSicon LOCK1u.svg
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Warwick Bar stop lock.svg
2000_Soo_Locks_Gate_winding_machinery_HAER_MI-322-A-6-2.jpg
Rational scale to assess the harm of drugs (mean physical harm and mean dependence) zh.svg
Ben_Salem_Lock_Maury_River.jpg
Rational scale to assess the harm of drugs (mean physical harm and mean dependence) de.svg
Canaletto_-_Lock_near_Dolo_-_Google_Art_Project.jpg
Hobbema_-_The_Haarlem_Lock,_Amsterdam.jpg
Rational scale to assess the harm of drugs (mean physical harm and mean dependence).svg
Development of a rational scale to assess the harm of drugs of potential misuse (physical harm and dependence, NA free means).svg
Landschap met stenen brug Rijksmuseum SK-A-1935.jpeg
Illinois_&_Michigan_Canal,_Locks_&_Lockhouse.jpg
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John_Constable_-_The_Lock.jpg
John_Constable,_English_-_Sketch_for_"A_Boat_Passing_a_Lock"_-_Google_Art_Project.jpg
John_Constable_-_Study_of_A_boat_passing_a_lock_-_Google_Art_Project.jpg
John_Constable_-_The_Lock_(second_Foster_version).jpg
Homicide and Suicide Rate by Country.svg
Horin Lock Vltava Lateral Canal CZ large chamber 478.jpg
Horin Lock Vltava Lateral Canal CZ 475.jpg
Horin Lock Vltava Lateral Canal CZ large chamber 477.jpg
Panama_WDL183.png
Lock_at_Canal_Flats,_BC_1890.JPG
Lock_at_Canal_Flats,_BC_(close_up)_1890.JPG
Eire Canal, Lock 32.JPG
Lock_construction_at_Canal_Flats_1888.JPG
OHIO-ERIE_CANAL_LOCK_COLLECTS_ALGAE_AND_DEBRIS_SOUTH_OF_ALEXANDER_ROAD_AT_VALLEY_VIEW_NEAR_CLEVELAND,_OHIO._THE..._-_NARA_-_558000.tif
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OHIO-ERIE_CANAL_LOCK_COLLECTS_ALGAE_AND_DEBRIS_SOUTH_OF_ALEXANDER_ROAD_AT_VALLEY_VIEW_NEAR_CLEVELAND,_OHIO._THE..._-_NARA_-_558000.jpg
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EVERGLADE_KITE_SIGN_AT_CANAL_LOCK,_NEAR_40-MILE_BEND_-_NARA_-_544531.tif
OHIO-ERIE_CANAL_11_MILE_LOCK_AT_CANAL_ROAD_AND_VALLEY_VIEW_OHIO,_NEAR_CLEVELAND,_OHIO._THE_CANAL_CONNECTED_THE_GREAT..._-_NARA_-_558004.tif
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Bagnas lock 1.JPG
Bagnas lock 2.JPG
Bagnas lock 3.JPG
Portiragnes Lock 1.JPG
STUMPY_BASIN_LOCK_ON_THE_OHIO-ERIE_CANAL_WHERE_THE_BOATS_TURNED_AROUND,_NORTHEAST_OF_PENINSULA,_OHIO,_NEAR_CLEVELAND..._-_NARA_-_558011.tif
AERIAL_PHOTO_OF_THE_OLD_OHIO-ERIE_CANAL_WITH_LOCK_AND_SPILLWAY_IN_THE_FOREGROUND_AT_HILLSIDE_ROAD._CANAL_ROAD_RUNS..._-_NARA_-_558043.tif
STUMPY_BASIN_LOCK_ON_THE_OHIO-ERIE_CANAL_WHERE_THE_BOATS_TURNED_AROUND,_NORTHEAST_OF_PENINSULA,_OHIO,_NEAR_CLEVELAND..._-_NARA_-_558011.jpg
AERIAL_PHOTO_OF_THE_OLD_OHIO-ERIE_CANAL_WITH_LOCK_AND_SPILLWAY_IN_THE_FOREGROUND_AT_HILLSIDE_ROAD._CANAL_ROAD_RUNS..._-_NARA_-_558043.jpg
USS_Macdonough_(DDG-39)_and_USS_Scamp_(SSN-588)_in_Panama_Canal_lock_1984.jpeg
FMIB_38660_Machinery_for_Moving_a_Lock_Gate.jpeg
FMIB_38666_From_a_Model_of_Pedro_Miguel_Lock.jpeg
Prades lock 1.JPG
Prades lock 2.JPG
Portiragnes Lock 2.JPG
Villeneuve lock.JPG
Horseboat Maria.jpg
Canal-sequence.jpg
CLOSEUP_OF_A_LOCK_COVERED_WITH_ALGAE_AND_VINES_AT_HILLSIDE_AND_CANAL_ROADS_AT_VALLEY_VIEW,_NEAR_CLEVELAND,_OHIO...._-_NARA_-_558006.tif
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