Reluctantly, we left Tortuguero, and, once more, cruised down the river to meet the coach that was to take us up into the hills to La Fortuna. On the way, at one place, we came across a level crossing sign. I thought Costa Rica had no railways? But here was a narrow gauge track, which didn't seem to have been used for some considerable time. Indeed, at one point, a bridge had disappeared completely, but the track remained. I found later that the railway had been used in former times to transp