I’m a bit of a casual rail fan, and I love Google Street View (I’ve lost hours just exploring cities), so I think this is pretty cool. Google worked with Rhaetian Railway to mount one of their Street View trikes on a railroad flatcar to photograph the Albula-Bernina line in Switzerland, which is a UNESCO Heritage site. The photos aren’t up on Street View yet, but they’re coming soon. But they have posted photos of the process:
View Albula-Bernina Line in a larger map