Getting to know the best bike routes in a city takes can involve doing all the legwork yourself, or for a simpler option, consulting the CycleMap app. The app is free to download and includes information on over 1.3 million kilometers of the world's most popular bike paths.
Just like a Google Map, the app allows you to specify your start and desired end destination, but it provides information specific to cyclists like local bike shops and lane types. Beyond just being accessible to one city or country, these bike maps span multiple continents, including routes to take in North America as well as Europe and Asia. There's also a Pro version that will give bicyclists even more detailed information about road conditions, like whether the path is paved and the route's changes in elevation.