Mr's LeVay & Wright are spot-on. The Toonerville Trolley operates integrally with a tour boat to Tahquamenon Falls, Upper Peninsula of Michigan. The line has a legitimate claim to being the longest and oldest 2-footer in existance, but as Steve points out is practically off the railfan radar screen. The 2-ft gauge track was laid in 1927 on the right-of-way of an earlier standard-ga logging railroad. I believe it has been operated by the same family all that time. The TT has never run steam. Somewhere I have a picture from the 1930's of a 2-car train with a Fordson "critter" locomotive (probably a Brookeville conversion). The train in that picture is so full that people are hanging all over the locomotive and roofs of the cars. Their open observation cars are built up from WW 1-era trench railway equipment.
I ran across mention of the TT just recently while reading a feasability study for narrow-gauge people movers in Florida. Narrow-gauge data was so hard to come by that the study used the Toonerville Trolley's maintanence costs to make its economic estimates. The figure was around $200,000/year, but that may have included the tour boat services as well as the railroad.
An interesting little RR, it deserves a lot more attention than it gets.
J