Geared steam locomotive
A geared steam locomotive is a type of steam locomotive which uses gearing, usually reduction gearing, in the drivetrain, as opposed to the common directly driven design.
Omaha Zoo Railroad
Visitors to the Henry Doorly Zoo ride behind one of three locomotives for the trip around the park. Two of the engines are steam locomotives, and though they are similar in the basic principle of their operation, the two locomotives are otherwise quite different and guests can easily distinguish between them. The third engine is a diesel, which operates very differently from the steam locomotives. New coaches have been added and replacing the old coaches.