Tourists On Cruise Ship; Pedro Miguel Locks, Panama Canal, Panama

Gatun Locks Lighthouse, Panama Canal, Panama, Central America; Lighthouse

Panama Canal, Panama, Central America; Cruise Ship Going Under Centennial Bridge

Panama, Panama Canal, View of tug boat in Gatun Lake

Riveters at work on the lock gates at Miraflores, Panama Canal, 1910. From Hutchinson's History of the Nations, published 1915.

Aerial view of the Welland Canal and a ship in a canal lock; Thorold, Ontario, Canada

Merchant Ship Going Through A Lock; St. Catharines Ontario Canada

Merchant Ship Going Through A Lock; St. Catharines Ontario Canada

Lock 8 Port Colborne Sign With A Ship In The Background; Port Colborne, Ontario, Canada

Aerial of the Welland Canal and ships in a series of canal locks; Thorold, Ontario, Canada

A ship in a canal drives under the raised bridge on a clear sunny day, Ballard Locks, Seattle, Washington, Summer, USA

A fishing boat floats in a lock with a raised draw bridge in the background, Ballard Locks, Seattle, Washington, USA, Summer

Panama, Panama Canal, Miraflores Locks, ship in lock.