Have you taken your bicycle out of storage yet? Spring is a great time to get your wheels in gear and start exploring what lies round yonder hill or in a neighboring village.
Germany is blessed with plenty of trails that can be ridden on any given weekend; alternately, get out with thousands of other cyclists, hikers and in-line skaters for an auto-free day, when huge swaths of highway are taken up by people traveling under their own steam and cars are banned.