Well, this might start a bit of controversy...
Comments welcome.
Robin
There were (and are) a number of two-foot gauge railways around the world much longer than the WW&F. The longest was probably the Otavi railway in South West Africa, which was around 300 miles long at its greatest extent, and ran overnight 'express' trains with sleeping cars and diners.
The longest surviving line is probably the Avontuur in Cape Province, South Africa, which is 177 miles long, although the top third of the line has been closed for some time. When I rode it in 1997, on a tour organised by the Ffestiniog Railway, it took three days to cover the entire line - although that did include a return trip up the Patensie branch, which added another 38 miles, and numerous stops for run-pasts, long lunches and a minor derailment at one point... We travelled in carriages built at various time over the previous 100 years and I had few complaints about the standard of comfort, or the ride.
Even then, our train was the first to have been the whole way up to Avontuur for over a year, and I have vivid memories of the crew digging out the mud and gravel that blocked the track at some of the dirt road crossings. At Avontuur itself the railway authorities had had to send in a bulldozer to clear a landslide about 200 feet long and 3 to 6 feet deep from the station throat so that we could get in!
The train included a commissary car which was equipped with ovens, and one of many pleasant memories of the trip are the regular mid-morning and late afternoon stops in a convenient loop where tables were set up by the lineside and the staff served tea and/or coffee and freshly-baked scones...