RailMapOnline is a free website that provides interactive maps of past and present:
- UK and Ireland railways
- US West railroads
- UK and Irish canals
There are options for exploring via layers (such as narrow guage, Metro, historic tramways), legend (companies) and places (stations). The resource also features a range of tools, including ability to select which coordinate system to display positions with.
The resource is still being added to: the UK map is mostly finished, while the US map is a work in progress.