Cycling
Cologne has an excellent network of cycling routes that take you along the river, through forested areas, and to the leafy suburbs. Themed guided tours often include a rental bike and show you the best street art, Roman monuments or best riverside spots. If you prefer to explore on your own, you can rent a bike at several stations in the city.
Radstation Köln, Breslauer Platz, Cologne, Germany, +49 221 139 7190