The Diamond Valley  Railway is a 7.25"  (184mm) gauge miniature railway located in Eltham Lower Park in the Shire  of Nillumbik. This railway  carries the second largest  number of passengers in Victoria carried by  Heritage rail.

The railway  was established in the 1940's in Chelsworth Park Ivanhoe. Following flooding by  the Yarra River  it was re-established in the Eltham Lower Park in 1959. The railway is a wholly volunteer orientated non-profit railway. The main line  is some 2km in length. The line  is fully signaled with  colour light signals and is controlled by two signal boxes.

The railway re-creates the 1920's era and buildings, bridges, tunnels and other infrastructure, all in scale,  conforms to this era. Both steam and internal combustion engines are used for motive power as well as scale electric trains.

Over 2.3 million passengers have used the railway since it started passenger trains operations during October, 1961.

The Railway  runs every Sunday except Christmas day from 11.00am to  5.00pm some public holidays and  on Wednesdays during school holidays from 1.00pm to 4.00pm.

The train ride takes about 12 minutes and a special attraction is that children under the age of 2 years travel free.