So, now that I have briefed you all about touring around the world on a bicycle, you do need to know that there is more to do with a bike than to just see the sites around you.
If you work hard enough and train enough on a bicycle, you could be good enough to, you know, race other people on your bike or do some other things with a bicycle. Whatever your purpose is with using a bike, you could still get a goo amount of exercise from riding a bike.
You could ride a bike to school, travel on your bicycle to your place of employment. I mean, some police officers ride around a bike during work, catching the bad guys who are fleeing by foot. You could travel to the beach on your bike and feel the warm breeze and see the beautiful ocean. Bicycles are fun and you should be able to enjoy yourself.