First opened in 1914, the Panama Canal is 50 miles long and raises ships up from the Pacific and through Panama, before lowering them back down again to the Caribbean, and vice versa. The canal uses three sets of locks: Miraflores and Pedro Miguel Locks on the Pacific side and Gatun Locks on the Caribbean side. Most tourists visit the Miraflores Locks from Panama city. You can also take a boat trip.