Travel tours can be wonderful ways to travel and see the country or the world. You can travel with a small, specialized group or a larger, more generic group. You can go a short distance or a long one, or anything in between. Your travel can be by foot, car, train, boat or plane. In fact, the choices can be overwhelming.
Ferne Arfin,Guide to Senior Travel at About.com has a good article called How To Choose the Right Senior Tour. It will give you a good place to start sorting out your touring options.
In fact, Ferne has lots of great info about travel for seniors on her site. Take a few moments and explore.