Panama's only train service is the Panama Canal Railway, which operates between Panama City and Colón on weekdays. Tracks run alongside the canal itself and over causeways in Gatún Lake. The hour-long trip costs $25 each way; trains leave Panama City at 7:15 am and Colón at 5:15 pm. You can buy tickets at the station before you leave.
Panama Canal Railway. 507/317–6070; www.panarail.com.