Europe
Alpe Adria Radweg
This biking trail goes from Salzburg to the Adriatic, with some segments on trains.

Hebridean National Cycle Network Route
NCR 780 takes cyclists through the Outer Hebrides.

Vasco-Navarro Railway Greenway
The Vasco-Navarro Railway Greenway is a roughly 70 km biking route on a rail bed in the Basque country of Spain.
Rallarvegen
Originally the construction support road for the Oslo–Bergen railroad, this 82 km ride is one of the most popular in Norway.
