Stoomtrein Katwijk Leiden. J. Pellenbargweg 1 J. Pellenbargweg 1, 2235 SP Valkenburg, Netherlands . http://www.stoomtreinkatwijkleiden.nl/
Possibly/probably the largest collection of narrow gauge diesel locomotives in the world ! the vast locomotive fleet are housed in 3 different sheds and the main museum building, plus the railway boasts a ample workshop area where a number of items are being worked on.