When do you have long wait for next flight, don’t stay in airport. Explore where you are.
On the way to Costa Rica we had 10 hrs wait so we decided to see famous Panama canal. We took one taxi for city tour (~80$) – little bit expensive but sometimes it is just easier. Here in Panama you can pay in dollars is 1:1 to panamas currency Balboa.
Canal is very famous and of course how to be in Panama City and don’t see it. Good place to see is Miraflores Locks with terraces and observation decks (20$ ticket). They have museum about how they built it. It is long wait for ship to go through the canal but still is faster then go around South America. Total time we spent around 2 hrs. In museum you can get really interesting information e.g. toll for ships is between $300 000 to $400 000 but even up to $800 000 if greater cargo.
Take a ride to Historic centre. It is small but you can feel Panama’s climate. We visited Saint Joseph church where is golden Altar and Cathedral Plaza
Panama Viejo is part of the old Panama City and former capital of the country. Now there is only ruins and near by is museum.