A cruise on the Panama Canal through Central America can appeal to more than one type of passenger. The Panama Canal portion of the trip focuses on the transit itself,with onboard lectures as ships make their way through the locks. Within the rest of Central America, put on your hiking boots and head for the rainforest or kick off your shoes and hit the beach. Port highlights include Costa Rica's Puntarenas and Limon, with excursions that cater to adrenaline junkies.