Scenic route
Chemin de Fer à Vapeur des Trois Vallées
Mariembourg → Treignes · Belgium
- Distance
- 14 km
- Fastest time
- 40 min
- Top speed
- 40 km/h
- Operator
- CFV3V
- Train
- Heritage steam
- Countries
- Belgium
- In service since
- 1854
Page last updated 2026-07-22 · figures are published values, not live data · corrections log
Belgium’s premier steam railway: CFV3V engines bark up the wooded Viroin valley on an 1854 Entre-Sambre-et-Meuse line to the great museum shed at Treignes.
View on the world railway map →More scenic routes
- Glacier Express
“The world’s slowest express”: 291 bridges, 91 tunnels and the 2,033 m Oberalp Pass at an average of 36 km/h.
- Bernina Express
A UNESCO World Heritage railway: 7 % grades with no rack, the Brusio spiral, and the highest rail crossing of the Alps at 2,253 m.
- Bergensbanen
Northern Europe’s highest main line: over the bare Hardangervidda plateau at 1,237 m, through 182 tunnels.
- West Highland Line
Regularly voted the world’s most scenic railway: around Rannoch Moor and over the 21-arch Glenfinnan Viaduct of film fame.
More train routes in Belgium.