I planned a later instalment just on heavy-haul ore trains, but here: the currently longest (and heaviest) are in Australia, BHP's regular trains are up to 3.6 km, and BHP holds the world record with a test train twice as long (100,000 tons total!).
PS. do you have close-up images of cattle and people atop the ore? It would fit nicely for the theme I plan for next week! *Lunatic*, n. One whose delusions are out of fashion.
I am coming to Budapest next week. Will you be around? "Dieu se rit des hommes qui se plaignent des conséquences alors qu'ils en chérissent les causes" Jacques-Bénigne Bossuet