Panama Canal Locks; Panama City, Panama ~ One cannot go to Panama City without taking the opportunity to watch the ships traversing the canal through the Panama Canal Locks. In 1993, when I was in Panama, I found great fun in watching the ships enter each gate and raise to enter the successive lock.
There was 6-inches to spare when the USS Missouri passed through the Panama Canal in 1945. Wider locks are due to be completed in 2014, allowing 49-metre-wide "New Panamax" ships to use it. But it will remain off limits to the largest container ships.