Railpasses Around Europe
In Europe and other parts of the world, the best way to get around cities and to other countries is by train. Looking at direct fares it may seem incredibly expensive and more economical to fly. However, you can purchase a multiple-day railpass that saves you up to 33 percent on your tickets. Passes can be purchased by three to 30 days and can be used from country to country. Depending on your demographic, you may even save more than 33 percent. Though saving money with a railpass is appealing, the flexibility of a railpass prevents you from waiting in line for tickets and is often valid on city-wide and country-wide rail services. You can purchase one pass to last the entirety of your trip.
If you do a bit of research, you can usually determine the best rail pass to give you maximum flexibility and least cost.
Check out the rail pass info at http://www.raileurope.com/index.html
You can also get very good advice (and purchase your pass) at ricksteves.com