Supplements
High quality trains, such as trains with special services or trains that are faster than conventional trains, often require a supplement. With a Eurail Pass you pay a special price (Pass holder fare) which varies depending on the kind of train and the service offered.
On some special trains, like for example the Alaris and the Thalys, the number of seats available for Eurail travelers is limited. Also for this reason it's recommended that you make advance reservations.
