A scenic railway is an early roller coaster design that uses only road wheels.
It usually requires a brakeman to ride on the train and slow it, if needed.
The power and setup requirements of the travelling version resulted in special Showman's engines (commonly known as special scenic) being built with an additional dynamo and a crane mounted on an enlarged coal bunker.
[1] The traveling versions of the Scenic railway were built between 1910 and 1925 with the last one being scrapped 1962.
[1] The space in the middle of the travelling version was most commonly filled with a waterfall and organ.