The train, named Big Boy No. 4104, is classified as the largest operating steam locomotive on the planet. The Union Pacific Railroad announced that 'Big Boy' will go on its second-ever tour across ...

The train cost £8.6 billion ($11 bn) to build, which was £3.9 bn more than previously expected, with a single adult Skyline fare costing around £2.35 ($3) a day to ride.