Railways in the world

America

United StatesGeorgetown LoopHeritage Railway

Asia

IndiaDarjeelingDarjeeling Himalayan Railway [World Heritage]
NilgiriNilgiri Mountain Railway [World Heritage]
Kalka-ShimlaKalka-Shimla Railway [WH Tentative List]
MatheranMatheran Hill Railway [WH Tentative List]

Europe

AustriaSemmeringSemmering Railway [World Heritage]
ItalyRhaetian RailwayRhaetian Railway in the Albula / Bernina Landscapes [World Heritage]
NorwayBergensbanenBergensbanen National Park
FlåmsbanaFlåmsbana National Park
SwitzerlandRhaetian RailwayRhaetian Railway in the Albula / Bernina Landscapes [World Heritage]
Glacier ExpressGlacier Express National Park
United KingdomTalyllyn RailwayTalyllyn Railway National Park
Bluebell RailwayBluebell Railway National Park