Panama Canal
The Panama Canal was opened in 1914.   It was one the wonders of the world.  The canal looks like it needs more maintenance.  A new canal is being built to be completed in 2015.  More info on the new canal is in an article in Popular Mechanics.    For those of you who don't have the time to look at the pictures  Youtube has a 90 second transit of the canal at   http://www.youtube.com/watch?v=-vi19z4LEi0         .

Click a picture to see a larger view.