I am not sure whether this falls under this category or should go somewhere else.
Over Christmas 2018 I have been reading through a number of old copies of 'The Railway Magazine'. Most of the magazines were from 1950. I found an article about the Flam Railway in Norway and thought that members of the forum might be interested.The railway provides the connection between the national railway network in Norway and the Sognefjord.
It was the plan of the 'spiral at the head of the valley that grabbed my attention. It is perhaps the ultimate justification for a rabbit warren style of model railway layout. The height gained in the spiral was significant.
http://rogerfarnworth.com/2019/01/01...ailway-in-1950