Eurail sells tickets for European railroads to non-Europeans. Despite the number of budget airlines offering cheap tickets, Eurail is still a budget travelers' option, should they plan on visiting several countries in Europe.

And for a limited period, Eurail has a special offer for Eurail SelectPasses.

If you purchase a 6, 8, or 10 day Eurail Selectpass online, you get an extra travel day FREE!

But first, how do Eurail SelectPasses work?

"With a Eurail Selectpass you can design your own taylor-made pass selecting 3, 4 or 5 European bordering countries for a duration of either 5, 6, 8 or 10 travel days within a 2-month period. If selecting 5 countries there is also the opportunity of choosing 15 travel days.

The Eurail Selectpass offers unlimited travel by rail (and on some shipping lines) within a selection of the following 22 European countries; Austria (including Liechtenstein), Benelux*, Bulgaria, Croatia, Denmark, Finland, France (including Monaco), Germany, Greece, Hungary, Italy, Norway, Portugal, Republic of Ireland, Romania, Serbia and Montenegro, Slovenia, Spain, Sweden, Switzerland."

So the next time you go to Europe, do consider using the Eurail.