We wathced three ships transit the Gatun Locks and then visited the observation area for the new lock construction. Very well put together tour and truly worth the cost if operation of the canal is of interest to you.
We were met at the pier by Chef Jorge (who was featured on "No Reservations" with Anthony Bourdain). First we toured the local fish and vegatable market which was an olfactory experience. Several "buffets" were being prepared and it is quite an operation to see half a dozen large pots with delectable local cuisine, each on it's own charcoal burner. Then we were whisked to one of his restaurants where he prepared a paella for us. The tour size is limited, we were only two couples, so got a lot of personal time with Jorge answering questions.